7904212457 has 2 divisors, whose sum is σ = 7904212458. Its totient is φ = 7904212456.

The previous prime is 7904212367. The next prime is 7904212471. The reversal of 7904212457 is 7542124097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7671832921 + 232379536 = 87589^2 + 15244^2 .

It is a cyclic number.

It is not a de Polignac number, because 7904212457 - 2²² = 7900018153 is a prime.

It is not a weakly prime, because it can be changed into another prime (7904212487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3952106228 + 3952106229.

It is an arithmetic number, because the mean of its divisors is an integer number (3952106229).

Almost surely, 2^7904212457 is an apocalyptic number.

It is an amenable number.

7904212457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7904212457 is an equidigital number, since it uses as much as digits as its factorization.

7904212457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 7904212457 is about 88905.6379370847. The cubic root of 7904212457 is about 1991.9856326046.

The spelling of 7904212457 in words is "seven billion, nine hundred four million, two hundred twelve thousand, four hundred fifty-seven".