1997913900 has 36 divisors (see below), whose sum is σ = 5780631752. Its totient is φ = 532776960.

The previous prime is 1997913877. The next prime is 1997913923. The reversal of 1997913900 is 93197991.

It is an interprime number because it is at equal distance from previous prime (1997913877) and next prime (1997913923).

It is a self number, because there is not a number n which added to its sum of digits gives 1997913900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3329557 + ... + 3330156.

Almost surely, 2^1997913900 is an apocalyptic number.

1997913900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997913900 is an abundant number, since it is smaller than the sum of its proper divisors (3782717852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997913900 is a wasteful number, since it uses less digits than its factorization.

1997913900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659730 (or 6659723 counting only the distinct ones).

The product of its (nonzero) digits is 137781, while the sum is 48.

The square root of 1997913900 is about 44698.0301579387. The cubic root of 1997913900 is about 1259.4828439523.

The spelling of 1997913900 in words is "one billion, nine hundred ninety-seven million, nine hundred thirteen thousand, nine hundred".