1972055999 has 24 divisors (see below), whose sum is σ = 2173437360. Its totient is φ = 1786804992.

The previous prime is 1972055993. The next prime is 1972056029. The reversal of 1972055999 is 9995502791.

It is not a de Polignac number, because 1972055999 - 2⁴ = 1972055983 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972055993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1182164 + ... + 1183830.

It is an arithmetic number, because the mean of its divisors is an integer number (90559890).

Almost surely, 2^1972055999 is an apocalyptic number.

1972055999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1972055999 is a deficient number, since it is larger than the sum of its proper divisors (201381361).

1972055999 is a wasteful number, since it uses less digits than its factorization.

1972055999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 2296350, while the sum is 56.

The square root of 1972055999 is about 44407.8371349022. The cubic root of 1972055999 is about 1254.0256346152.

The spelling of 1972055999 in words is "one billion, nine hundred seventy-two million, fifty-five thousand, nine hundred ninety-nine".