72697039 has 2 divisors, whose sum is σ = 72697040. Its totient is φ = 72697038.

The previous prime is 72697033. The next prime is 72697057. The reversal of 72697039 is 93079627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72697039 - 2¹¹ = 72694991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72696986 and 72697004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72697033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36348519 + 36348520.

It is an arithmetic number, because the mean of its divisors is an integer number (36348520).

Almost surely, 2^72697039 is an apocalyptic number.

72697039 is a deficient number, since it is larger than the sum of its proper divisors (1).

72697039 is an equidigital number, since it uses as much as digits as its factorization.

72697039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 72697039 is about 8526.2558605756. The cubic root of 72697039 is about 417.3549550536.

The spelling of 72697039 in words is "seventy-two million, six hundred ninety-seven thousand, thirty-nine".