399415607 has 2 divisors, whose sum is σ = 399415608. Its totient is φ = 399415606.

The previous prime is 399415603. The next prime is 399415651. The reversal of 399415607 is 706514993.

It is an a-pointer prime, because the next prime (399415651) can be obtained adding 399415607 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399415607 - 2² = 399415603 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399415603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199707803 + 199707804.

It is an arithmetic number, because the mean of its divisors is an integer number (199707804).

Almost surely, 2^399415607 is an apocalyptic number.

399415607 is a deficient number, since it is larger than the sum of its proper divisors (1).

399415607 is an equidigital number, since it uses as much as digits as its factorization.

399415607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 399415607 is about 19985.3848349237. The cubic root of 399415607 is about 736.4473044727.

The spelling of 399415607 in words is "three hundred ninety-nine million, four hundred fifteen thousand, six hundred seven".