464642491 has 2 divisors, whose sum is σ = 464642492. Its totient is φ = 464642490.

The previous prime is 464642489. The next prime is 464642501. The reversal of 464642491 is 194246464.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 464642491 - 2¹ = 464642489 is a prime.

Together with 464642489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (464642401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232321245 + 232321246.

It is an arithmetic number, because the mean of its divisors is an integer number (232321246).

Almost surely, 2^464642491 is an apocalyptic number.

464642491 is a deficient number, since it is larger than the sum of its proper divisors (1).

464642491 is an equidigital number, since it uses as much as digits as its factorization.

464642491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 40.

The square root of 464642491 is about 21555.5675174652. The cubic root of 464642491 is about 774.5324913993.

The spelling of 464642491 in words is "four hundred sixty-four million, six hundred forty-two thousand, four hundred ninety-one".