1972870291 has 12 divisors (see below), whose sum is σ = 2304129240. Its totient is φ = 1684284000.

The previous prime is 1972870283. The next prime is 1972870309. The reversal of 1972870291 is 1920782791.

It is not a de Polignac number, because 1972870291 - 2³ = 1972870283 is a prime.

It is a super-2 number, since 2×1972870291² = 7784434370220849362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1972870201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67906 + ... + 92503.

It is an arithmetic number, because the mean of its divisors is an integer number (192010770).

Almost surely, 2^1972870291 is an apocalyptic number.

1972870291 is a deficient number, since it is larger than the sum of its proper divisors (331258949).

1972870291 is a wasteful number, since it uses less digits than its factorization.

1972870291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160674 (or 160667 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 1972870291 is about 44417.0045252941. The cubic root of 1972870291 is about 1254.1982129677.

The spelling of 1972870291 in words is "one billion, nine hundred seventy-two million, eight hundred seventy thousand, two hundred ninety-one".