64351961 has 2 divisors, whose sum is σ = 64351962. Its totient is φ = 64351960.

The previous prime is 64351901. The next prime is 64351967. The reversal of 64351961 is 16915346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47004736 + 17347225 = 6856^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 64351961 - 2⁶ = 64351897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64351967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32175980 + 32175981.

It is an arithmetic number, because the mean of its divisors is an integer number (32175981).

Almost surely, 2^64351961 is an apocalyptic number.

It is an amenable number.

64351961 is a deficient number, since it is larger than the sum of its proper divisors (1).

64351961 is an equidigital number, since it uses as much as digits as its factorization.

64351961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 64351961 is about 8021.9674020779. The cubic root of 64351961 is about 400.7319120285.

The spelling of 64351961 in words is "sixty-four million, three hundred fifty-one thousand, nine hundred sixty-one".