64787501 has 2 divisors, whose sum is σ = 64787502. Its totient is φ = 64787500.

The previous prime is 64787497. The next prime is 64787507. The reversal of 64787501 is 10578746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36421225 + 28366276 = 6035^2 + 5326^2 .

It is a cyclic number.

It is not a de Polignac number, because 64787501 - 2² = 64787497 is a prime.

It is equal to p_3828737 and since 64787501 and 3828737 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64787507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32393750 + 32393751.

It is an arithmetic number, because the mean of its divisors is an integer number (32393751).

Almost surely, 2^64787501 is an apocalyptic number.

It is an amenable number.

64787501 is a deficient number, since it is larger than the sum of its proper divisors (1).

64787501 is an equidigital number, since it uses as much as digits as its factorization.

64787501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 64787501 is about 8049.0683311797. The cubic root of 64787501 is about 401.6339435664.

The spelling of 64787501 in words is "sixty-four million, seven hundred eighty-seven thousand, five hundred one".