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68552969 = 193608051
BaseRepresentation
bin1000001011000…
…00100100001001
311202222211222212
410011200210021
5120022143334
610445154505
71461455612
oct405404411
9152884885
1068552969
1135772951
121ab5ba35
1311282cb4
149166c09
156041ece
hex4160909

68552969 has 4 divisors (see below), whose sum is σ = 72161040. Its totient is φ = 64944900.

The previous prime is 68552941. The next prime is 68552977. The reversal of 68552969 is 96925586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96925586 = 248462793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68552969 is a prime.

It is a super-2 number, since 2×685529692 = 9399019117429922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68552909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804007 + ... + 1804044.

It is an arithmetic number, because the mean of its divisors is an integer number (18040260).

Almost surely, 268552969 is an apocalyptic number.

It is an amenable number.

68552969 is a deficient number, since it is larger than the sum of its proper divisors (3608071).

68552969 is a wasteful number, since it uses less digits than its factorization.

68552969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608070.

The product of its digits is 1166400, while the sum is 50.

The square root of 68552969 is about 8279.6720345676. The cubic root of 68552969 is about 409.2689112973.

The spelling of 68552969 in words is "sixty-eight million, five hundred fifty-two thousand, nine hundred sixty-nine".

Divisors: 1 19 3608051 68552969