64251497 has 2 divisors, whose sum is σ = 64251498. Its totient is φ = 64251496.

The previous prime is 64251487. The next prime is 64251511. The reversal of 64251497 is 79415246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59845696 + 4405801 = 7736^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 64251497 - 2⁶ = 64251433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64251497.

It is not a weakly prime, because it can be changed into another prime (64251427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32125748 + 32125749.

It is an arithmetic number, because the mean of its divisors is an integer number (32125749).

Almost surely, 2^64251497 is an apocalyptic number.

It is an amenable number.

64251497 is a deficient number, since it is larger than the sum of its proper divisors (1).

64251497 is an equidigital number, since it uses as much as digits as its factorization.

64251497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 64251497 is about 8015.7031506911. The cubic root of 64251497 is about 400.5232672633.

The spelling of 64251497 in words is "sixty-four million, two hundred fifty-one thousand, four hundred ninety-seven".