65490931 has 4 divisors (see below), whose sum is σ = 71444664. Its totient is φ = 59537200.

The previous prime is 65490923. The next prime is 65490937. The reversal of 65490931 is 13909456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65490931 - 2³ = 65490923 is a prime.

It is a super-2 number, since 2×65490931² = 8578124086493522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65490937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2976850 + ... + 2976871.

It is an arithmetic number, because the mean of its divisors is an integer number (17861166).

Almost surely, 2^65490931 is an apocalyptic number.

65490931 is a deficient number, since it is larger than the sum of its proper divisors (5953733).

65490931 is a wasteful number, since it uses less digits than its factorization.

65490931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5953732.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 65490931 is about 8092.6467240329. The cubic root of 65490931 is about 403.0822939036.

It can be divided in two parts, 654909 and 31, that added together give a triangular number (654940 = T₁₁₄₄).

The spelling of 65490931 in words is "sixty-five million, four hundred ninety thousand, nine hundred thirty-one".