64742039 has 2 divisors, whose sum is σ = 64742040. Its totient is φ = 64742038.

The previous prime is 64742017. The next prime is 64742053. The reversal of 64742039 is 93024746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64742039 is a prime.

It is a super-2 number, since 2×64742039² = 8383063227755042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64742089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32371019 + 32371020.

It is an arithmetic number, because the mean of its divisors is an integer number (32371020).

Almost surely, 2^64742039 is an apocalyptic number.

64742039 is a deficient number, since it is larger than the sum of its proper divisors (1).

64742039 is an equidigital number, since it uses as much as digits as its factorization.

64742039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 64742039 is about 8046.2437820389. The cubic root of 64742039 is about 401.5399781431.

The spelling of 64742039 in words is "sixty-four million, seven hundred forty-two thousand, thirty-nine".