64310891 has 2 divisors, whose sum is σ = 64310892. Its totient is φ = 64310890.

The previous prime is 64310887. The next prime is 64310923. The reversal of 64310891 is 19801346.

It is a happy number.

It is an a-pointer prime, because the next prime (64310923) can be obtained adding 64310891 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64310891 - 2² = 64310887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64310861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32155445 + 32155446.

It is an arithmetic number, because the mean of its divisors is an integer number (32155446).

Almost surely, 2^64310891 is an apocalyptic number.

64310891 is a deficient number, since it is larger than the sum of its proper divisors (1).

64310891 is an equidigital number, since it uses as much as digits as its factorization.

64310891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 64310891 is about 8019.4071476637. The cubic root of 64310891 is about 400.6466436500.

The spelling of 64310891 in words is "sixty-four million, three hundred ten thousand, eight hundred ninety-one".