2257908397 has 4 divisors (see below), whose sum is σ = 2390726556. Its totient is φ = 2125090240.

The previous prime is 2257908383. The next prime is 2257908439. The reversal of 2257908397 is 7938097522.

2257908397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1572201801 + 685706596 = 39651^2 + 26186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257908397 - 2⁷ = 2257908269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257908307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66409054 + ... + 66409087.

It is an arithmetic number, because the mean of its divisors is an integer number (597681639).

Almost surely, 2^2257908397 is an apocalyptic number.

It is an amenable number.

2257908397 is a deficient number, since it is larger than the sum of its proper divisors (132818159).

2257908397 is a wasteful number, since it uses less digits than its factorization.

2257908397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132818158.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 2257908397 is about 47517.4536039127. The cubic root of 2257908397 is about 1311.9041510279.

The spelling of 2257908397 in words is "two billion, two hundred fifty-seven million, nine hundred eight thousand, three hundred ninety-seven".