7990057 has 2 divisors, whose sum is σ = 7990058. Its totient is φ = 7990056.

The previous prime is 7990001. The next prime is 7990063. The reversal of 7990057 is 7500997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6170256 + 1819801 = 2484^2 + 1349^2 .

It is a cyclic number.

It is not a de Polignac number, because 7990057 - 2⁷ = 7989929 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7989998 and 7990025.

It is not a weakly prime, because it can be changed into another prime (7990067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995028 + 3995029.

It is an arithmetic number, because the mean of its divisors is an integer number (3995029).

Almost surely, 2^7990057 is an apocalyptic number.

It is an amenable number.

7990057 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990057 is an equidigital number, since it uses as much as digits as its factorization.

7990057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 37.

The square root of 7990057 is about 2826.6688875777. The cubic root of 7990057 is about 199.9171073154.

The spelling of 7990057 in words is "seven million, nine hundred ninety thousand, fifty-seven".