39400007 has 2 divisors, whose sum is σ = 39400008. Its totient is φ = 39400006.

The previous prime is 39400001. The next prime is 39400021. The reversal of 39400007 is 70000493.

It is a weak prime.

It is an emirp because it is prime and its reverse (70000493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39400007 - 2⁴ = 39399991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39400001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19700003 + 19700004.

It is an arithmetic number, because the mean of its divisors is an integer number (19700004).

Almost surely, 2^39400007 is an apocalyptic number.

39400007 is a deficient number, since it is larger than the sum of its proper divisors (1).

39400007 is an equidigital number, since it uses as much as digits as its factorization.

39400007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 39400007 is about 6276.9424881864. The cubic root of 39400007 is about 340.2766116913.

The spelling of 39400007 in words is "thirty-nine million, four hundred thousand, seven".