65729731 has 2 divisors, whose sum is σ = 65729732. Its totient is φ = 65729730.

The previous prime is 65729707. The next prime is 65729737. The reversal of 65729731 is 13792756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65729731 - 2¹⁵ = 65696963 is a prime.

It is a super-2 number, since 2×65729731² = 8640795074664722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65729737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32864865 + 32864866.

It is an arithmetic number, because the mean of its divisors is an integer number (32864866).

Almost surely, 2^65729731 is an apocalyptic number.

65729731 is a deficient number, since it is larger than the sum of its proper divisors (1).

65729731 is an equidigital number, since it uses as much as digits as its factorization.

65729731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 65729731 is about 8107.3874336928. The cubic root of 65729731 is about 403.5716201544.

The spelling of 65729731 in words is "sixty-five million, seven hundred twenty-nine thousand, seven hundred thirty-one".