65772431 has 2 divisors, whose sum is σ = 65772432. Its totient is φ = 65772430.

The previous prime is 65772419. The next prime is 65772463. The reversal of 65772431 is 13427756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65772431 - 2⁶ = 65772367 is a prime.

It is a super-2 number, since 2×65772431² = 8652025359299522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65772391 and 65772400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65772491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32886215 + 32886216.

It is an arithmetic number, because the mean of its divisors is an integer number (32886216).

Almost surely, 2^65772431 is an apocalyptic number.

65772431 is a deficient number, since it is larger than the sum of its proper divisors (1).

65772431 is an equidigital number, since it uses as much as digits as its factorization.

65772431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 65772431 is about 8110.0204068794. The cubic root of 65772431 is about 403.6589919707.

The spelling of 65772431 in words is "sixty-five million, seven hundred seventy-two thousand, four hundred thirty-one".