2972399991 has 32 divisors (see below), whose sum is σ = 4421910528. Its totient is φ = 1760559840.

The previous prime is 2972399951. The next prime is 2972400031. The reversal of 2972399991 is 1999932792.

It is an interprime number because it is at equal distance from previous prime (2972399951) and next prime (2972400031).

It is not a de Polignac number, because 2972399991 - 2¹⁰ = 2972398967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972399951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1896090 + ... + 1897656.

It is an arithmetic number, because the mean of its divisors is an integer number (138184704).

Almost surely, 2^2972399991 is an apocalyptic number.

2972399991 is a deficient number, since it is larger than the sum of its proper divisors (1449510537).

2972399991 is a wasteful number, since it uses less digits than its factorization.

2972399991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851.

The product of its digits is 4960116, while the sum is 60.

The square root of 2972399991 is about 54519.7211199764. The cubic root of 2972399991 is about 1437.8130368651.

The spelling of 2972399991 in words is "two billion, nine hundred seventy-two million, three hundred ninety-nine thousand, nine hundred ninety-one".