7870399 has 2 divisors, whose sum is σ = 7870400. Its totient is φ = 7870398.

The previous prime is 7870391. The next prime is 7870409. The reversal of 7870399 is 9930787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7870399 - 2³ = 7870391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7870391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3935199 + 3935200.

It is an arithmetic number, because the mean of its divisors is an integer number (3935200).

Almost surely, 2^7870399 is an apocalyptic number.

7870399 is a deficient number, since it is larger than the sum of its proper divisors (1).

7870399 is an equidigital number, since it uses as much as digits as its factorization.

7870399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 7870399 is about 2805.4231409896. The cubic root of 7870399 is about 198.9141065137.

The spelling of 7870399 in words is "seven million, eight hundred seventy thousand, three hundred ninety-nine".