64238501 has 2 divisors, whose sum is σ = 64238502. Its totient is φ = 64238500.

The previous prime is 64238483. The next prime is 64238507. The reversal of 64238501 is 10583246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63218401 + 1020100 = 7951^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 64238501 - 2⁶ = 64238437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64238507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119250 + 32119251.

It is an arithmetic number, because the mean of its divisors is an integer number (32119251).

Almost surely, 2^64238501 is an apocalyptic number.

It is an amenable number.

64238501 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238501 is an equidigital number, since it uses as much as digits as its factorization.

64238501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 64238501 is about 8014.8924509316. The cubic root of 64238501 is about 400.4962611409.

The spelling of 64238501 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred one".