2102497957 has 4 divisors (see below), whose sum is σ = 2402854816. Its totient is φ = 1802141100.

The previous prime is 2102497951. The next prime is 2102497961. The reversal of 2102497957 is 7597942012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2102497957 - 2³ = 2102497949 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 (2102497951) 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, 150178419 + ... + 150178432.

It is an arithmetic number, because the mean of its divisors is an integer number (600713704).

Almost surely, 2^2102497957 is an apocalyptic number.

It is an amenable number.

2102497957 is a deficient number, since it is larger than the sum of its proper divisors (300356859).

2102497957 is an equidigital number, since it uses as much as digits as its factorization.

2102497957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300356858.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 2102497957 is about 45853.0037947352. The cubic root of 2102497957 is about 1281.0867148584.

The spelling of 2102497957 in words is "two billion, one hundred two million, four hundred ninety-seven thousand, nine hundred fifty-seven".