7904987 has 2 divisors, whose sum is σ = 7904988. Its totient is φ = 7904986.

The previous prime is 7904959. The next prime is 7904993. The reversal of 7904987 is 7894097.

It is a strong prime.

It is an emirp because it is prime and its reverse (7894097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7904987 - 2⁸ = 7904731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7904947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3952493 + 3952494.

It is an arithmetic number, because the mean of its divisors is an integer number (3952494).

Almost surely, 2^7904987 is an apocalyptic number.

7904987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7904987 is an equidigital number, since it uses as much as digits as its factorization.

7904987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 7904987 is about 2811.5808720362. The cubic root of 7904987 is about 199.2050696145.

The spelling of 7904987 in words is "seven million, nine hundred four thousand, nine hundred eighty-seven".