1972750491 has 32 divisors (see below), whose sum is σ = 3074688000. Its totient is φ = 1248264864.

The previous prime is 1972750477. The next prime is 1972750501. The reversal of 1972750491 is 1940572791.

1972750491 is a `hidden beast` number, since 1 + 97 + 2 + 75 + 0 + 491 = 666.

It is not a de Polignac number, because 1972750491 - 2⁶ = 1972750427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1972750891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24846 + ... + 67548.

It is an arithmetic number, because the mean of its divisors is an integer number (96084000).

Almost surely, 2^1972750491 is an apocalyptic number.

1972750491 is a deficient number, since it is larger than the sum of its proper divisors (1101937509).

1972750491 is a wasteful number, since it uses less digits than its factorization.

1972750491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42800 (or 42794 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 1972750491 is about 44415.6559222083. The cubic root of 1972750491 is about 1254.1728259317.

The spelling of 1972750491 in words is "one billion, nine hundred seventy-two million, seven hundred fifty thousand, four hundred ninety-one".