64363961 has 2 divisors, whose sum is σ = 64363962. Its totient is φ = 64363960.

The previous prime is 64363951. The next prime is 64363969. The reversal of 64363961 is 16936346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52113961 + 12250000 = 7219^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64363961 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64363969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32181980 + 32181981.

It is an arithmetic number, because the mean of its divisors is an integer number (32181981).

Almost surely, 2^64363961 is an apocalyptic number.

It is an amenable number.

64363961 is a deficient number, since it is larger than the sum of its proper divisors (1).

64363961 is an equidigital number, since it uses as much as digits as its factorization.

64363961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 64363961 is about 8022.7153134085. The cubic root of 64363961 is about 400.7568192418.

The spelling of 64363961 in words is "sixty-four million, three hundred sixty-three thousand, nine hundred sixty-one".