Search a number
-
+
68800511 = 135292347
BaseRepresentation
bin1000001100111…
…00111111111111
311210110102120002
410012130333333
5120103104021
610454344515
71463536403
oct406347777
9153412502
1068800511
113592192a
121b05b13b
131133b880
1491cd103
15609050b
hex419cfff

68800511 has 4 divisors (see below), whose sum is σ = 74092872. Its totient is φ = 63508152.

The previous prime is 68800489. The next prime is 68800553. The reversal of 68800511 is 11500886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11500886 = 25750443.

It is a cyclic number.

It is not a de Polignac number, because 68800511 - 226 = 1691647 is a prime.

It is a super-2 number, since 2×688005112 = 9467020627722242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68800561) 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, 2646161 + ... + 2646186.

It is an arithmetic number, because the mean of its divisors is an integer number (18523218).

Almost surely, 268800511 is an apocalyptic number.

68800511 is a deficient number, since it is larger than the sum of its proper divisors (5292361).

68800511 is a wasteful number, since it uses less digits than its factorization.

68800511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292360.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 68800511 is about 8294.6073445342. The cubic root of 68800511 is about 409.7609373746.

The spelling of 68800511 in words is "sixty-eight million, eight hundred thousand, five hundred eleven".

Divisors: 1 13 5292347 68800511