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61697913 = 3171209763
BaseRepresentation
bin1110101101011…
…0111101111001
311022002120121220
43223112331321
5111243313123
610042222253
71346265204
oct353267571
9138076556
1061697913
1131910612
12187b4989
13ca22a54
1482a093b
15563ace3
hex3ad6f79

61697913 has 8 divisors (see below), whose sum is σ = 87103008. Its totient is φ = 38712384.

The previous prime is 61697903. The next prime is 61697929. The reversal of 61697913 is 31979616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61697913 - 29 = 61697401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61697903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604831 + ... + 604932.

It is an arithmetic number, because the mean of its divisors is an integer number (10887876).

Almost surely, 261697913 is an apocalyptic number.

It is an amenable number.

61697913 is a deficient number, since it is larger than the sum of its proper divisors (25405095).

61697913 is a wasteful number, since it uses less digits than its factorization.

61697913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209783.

The product of its digits is 61236, while the sum is 42.

The square root of 61697913 is about 7854.8019071139. The cubic root of 61697913 is about 395.1453035900.

The spelling of 61697913 in words is "sixty-one million, six hundred ninety-seven thousand, nine hundred thirteen".

Divisors: 1 3 17 51 1209763 3629289 20565971 61697913