1997232899 has 16 divisors (see below), whose sum is σ = 2240455680. Its totient is φ = 1771323840.

The previous prime is 1997232869. The next prime is 1997232917. The reversal of 1997232899 is 9982327991.

It is not a de Polignac number, because 1997232899 - 2²⁴ = 1980455683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997232829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28082 + ... + 69159.

It is an arithmetic number, because the mean of its divisors is an integer number (140028480).

Almost surely, 2^1997232899 is an apocalyptic number.

1997232899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1997232899 is a deficient number, since it is larger than the sum of its proper divisors (243222781).

1997232899 is a wasteful number, since it uses less digits than its factorization.

1997232899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97330.

The product of its digits is 4408992, while the sum is 59.

The square root of 1997232899 is about 44690.4117121335. The cubic root of 1997232899 is about 1259.3397269163.

The spelling of 1997232899 in words is "one billion, nine hundred ninety-seven million, two hundred thirty-two thousand, eight hundred ninety-nine".