2257691903 has 2 divisors, whose sum is σ = 2257691904. Its totient is φ = 2257691902.

The previous prime is 2257691899. The next prime is 2257691927. The reversal of 2257691903 is 3091967522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2257691903 - 2² = 2257691899 is a prime.

It is a super-2 number, since 2×2257691903² = 10194345457743522818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2257691003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128845951 + 1128845952.

It is an arithmetic number, because the mean of its divisors is an integer number (1128845952).

Almost surely, 2^2257691903 is an apocalyptic number.

2257691903 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257691903 is an equidigital number, since it uses as much as digits as its factorization.

2257691903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 2257691903 is about 47515.1755021488. The cubic root of 2257691903 is about 1311.8622201188.

The spelling of 2257691903 in words is "two billion, two hundred fifty-seven million, six hundred ninety-one thousand, nine hundred three".