65889731 has 2 divisors, whose sum is σ = 65889732. Its totient is φ = 65889730.

The previous prime is 65889689. The next prime is 65889751. The reversal of 65889731 is 13798856.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65889731 - 2²² = 61695427 is a prime.

It is a super-2 number, since 2×65889731² = 8682913302504722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65889751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944865 + 32944866.

It is an arithmetic number, because the mean of its divisors is an integer number (32944866).

Almost surely, 2^65889731 is an apocalyptic number.

65889731 is a deficient number, since it is larger than the sum of its proper divisors (1).

65889731 is an equidigital number, since it uses as much as digits as its factorization.

65889731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 65889731 is about 8117.2489797960. The cubic root of 65889731 is about 403.8988142337.

The spelling of 65889731 in words is "sixty-five million, eight hundred eighty-nine thousand, seven hundred thirty-one".