64632961 has 2 divisors, whose sum is σ = 64632962. Its totient is φ = 64632960.

The previous prime is 64632941. The next prime is 64632979. The reversal of 64632961 is 16923646.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37748736 + 26884225 = 6144^2 + 5185^2 .

It is a cyclic number.

It is not a de Polignac number, because 64632961 - 2⁷ = 64632833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64632961.

It is not a weakly prime, because it can be changed into another prime (64632941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32316480 + 32316481.

It is an arithmetic number, because the mean of its divisors is an integer number (32316481).

Almost surely, 2^64632961 is an apocalyptic number.

It is an amenable number.

64632961 is a deficient number, since it is larger than the sum of its proper divisors (1).

64632961 is an equidigital number, since it uses as much as digits as its factorization.

64632961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 64632961 is about 8039.4627308048. The cubic root of 64632961 is about 401.3143452611.

The spelling of 64632961 in words is "sixty-four million, six hundred thirty-two thousand, nine hundred sixty-one".