465491881 has 2 divisors, whose sum is σ = 465491882. Its totient is φ = 465491880.

The previous prime is 465491879. The next prime is 465491893. The reversal of 465491881 is 188194564.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454542400 + 10949481 = 21320^2 + 3309^2 .

It is a cyclic number.

It is not a de Polignac number, because 465491881 - 2¹ = 465491879 is a prime.

It is a super-2 number, since 2×465491881² = 433365382553836322, which contains 22 as substring.

Together with 465491879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (465491281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232745940 + 232745941.

It is an arithmetic number, because the mean of its divisors is an integer number (232745941).

Almost surely, 2^465491881 is an apocalyptic number.

It is an amenable number.

465491881 is a deficient number, since it is larger than the sum of its proper divisors (1).

465491881 is an equidigital number, since it uses as much as digits as its factorization.

465491881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 46.

The square root of 465491881 is about 21575.2608558970. The cubic root of 465491881 is about 775.0041656384.

The spelling of 465491881 in words is "four hundred sixty-five million, four hundred ninety-one thousand, eight hundred eighty-one".