64787539 has 2 divisors, whose sum is σ = 64787540. Its totient is φ = 64787538.

The previous prime is 64787507. The next prime is 64787563. The reversal of 64787539 is 93578746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64787539 - 2⁵ = 64787507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64787492 and 64787501.

It is not a weakly prime, because it can be changed into another prime (64787579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32393769 + 32393770.

It is an arithmetic number, because the mean of its divisors is an integer number (32393770).

Almost surely, 2^64787539 is an apocalyptic number.

64787539 is a deficient number, since it is larger than the sum of its proper divisors (1).

64787539 is an equidigital number, since it uses as much as digits as its factorization.

64787539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 64787539 is about 8049.0706917010. The cubic root of 64787539 is about 401.6340220902.

The spelling of 64787539 in words is "sixty-four million, seven hundred eighty-seven thousand, five hundred thirty-nine".