72701939 has 2 divisors, whose sum is σ = 72701940. Its totient is φ = 72701938.

The previous prime is 72701933. The next prime is 72701953. The reversal of 72701939 is 93910727.

It is a weak prime.

It is an emirp because it is prime and its reverse (93910727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72701939 - 2¹² = 72697843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (72701933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36350969 + 36350970.

It is an arithmetic number, because the mean of its divisors is an integer number (36350970).

Almost surely, 2^72701939 is an apocalyptic number.

72701939 is a deficient number, since it is larger than the sum of its proper divisors (1).

72701939 is an equidigital number, since it uses as much as digits as its factorization.

72701939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 72701939 is about 8526.5432034324. The cubic root of 72701939 is about 417.3643318377.

The spelling of 72701939 in words is "seventy-two million, seven hundred one thousand, nine hundred thirty-nine".