1172971971 has 6 divisors (see below), whose sum is σ = 1694292860. Its totient is φ = 781981308.

The previous prime is 1172971949. The next prime is 1172972033. The reversal of 1172971971 is 1791792711.

It is not a de Polignac number, because 1172971971 - 2⁵ = 1172971939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172971571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65165101 + ... + 65165118.

Almost surely, 2^1172971971 is an apocalyptic number.

1172971971 is a deficient number, since it is larger than the sum of its proper divisors (521320889).

1172971971 is a wasteful number, since it uses less digits than its factorization.

1172971971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130330225 (or 130330222 counting only the distinct ones).

The product of its digits is 55566, while the sum is 45.

The square root of 1172971971 is about 34248.6783832603. The cubic root of 1172971971 is about 1054.6196965623.

The spelling of 1172971971 in words is "one billion, one hundred seventy-two million, nine hundred seventy-one thousand, nine hundred seventy-one".