1972885945 has 16 divisors (see below), whose sum is σ = 2400030720. Its totient is φ = 1556743104.

The previous prime is 1972885931. The next prime is 1972885961. The reversal of 1972885945 is 5495882791.

It is a cyclic number.

It is not a de Polignac number, because 1972885945 - 2⁵ = 1972885913 is a prime.

It is a super-3 number, since 3×1972885945³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1972885945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100876 + ... + 118834.

It is an arithmetic number, because the mean of its divisors is an integer number (150001920).

Almost surely, 2^1972885945 is an apocalyptic number.

It is an amenable number.

1972885945 is a deficient number, since it is larger than the sum of its proper divisors (427144775).

1972885945 is a wasteful number, since it uses less digits than its factorization.

1972885945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18264.

The product of its digits is 7257600, while the sum is 58.

The square root of 1972885945 is about 44417.1807412402. The cubic root of 1972885945 is about 1254.2015301594.

The spelling of 1972885945 in words is "one billion, nine hundred seventy-two million, eight hundred eighty-five thousand, nine hundred forty-five".