64369691 has 2 divisors, whose sum is σ = 64369692. Its totient is φ = 64369690.

The previous prime is 64369681. The next prime is 64369693. The reversal of 64369691 is 19696346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64369691 - 2²² = 60175387 is a prime.

Together with 64369693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64369693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32184845 + 32184846.

It is an arithmetic number, because the mean of its divisors is an integer number (32184846).

Almost surely, 2^64369691 is an apocalyptic number.

64369691 is a deficient number, since it is larger than the sum of its proper divisors (1).

64369691 is an equidigital number, since it uses as much as digits as its factorization.

64369691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 64369691 is about 8023.0724164749. The cubic root of 64369691 is about 400.7687113442.

The spelling of 64369691 in words is "sixty-four million, three hundred sixty-nine thousand, six hundred ninety-one".