2558397997 has 2 divisors, whose sum is σ = 2558397998. Its totient is φ = 2558397996.

The previous prime is 2558397979. The next prime is 2558398021. The reversal of 2558397997 is 7997938552.

2558397997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (2558397979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2430391401 + 128006596 = 49299^2 + 11314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2558397997 - 2²³ = 2550009389 is a prime.

It is a super-2 number, since 2×2558397997² = 13090800622107224018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2558394997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279198998 + 1279198999.

It is an arithmetic number, because the mean of its divisors is an integer number (1279198999).

Almost surely, 2^2558397997 is an apocalyptic number.

It is an amenable number.

2558397997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2558397997 is an equidigital number, since it uses as much as digits as its factorization.

2558397997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 64.

The square root of 2558397997 is about 50580.6089030174. The cubic root of 2558397997 is about 1367.6953450273.

The spelling of 2558397997 in words is "two billion, five hundred fifty-eight million, three hundred ninety-seven thousand, nine hundred ninety-seven".