972291491 has 8 divisors (see below), whose sum is σ = 993613824. Its totient is φ = 950995720.

The previous prime is 972291487. The next prime is 972291511. The reversal of 972291491 is 194192279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 972291491 - 2² = 972291487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972291401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79406 + ... + 90828.

It is an arithmetic number, because the mean of its divisors is an integer number (124201728).

Almost surely, 2^972291491 is an apocalyptic number.

972291491 is a deficient number, since it is larger than the sum of its proper divisors (21322333).

972291491 is a wasteful number, since it uses less digits than its factorization.

972291491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13281.

The product of its digits is 81648, while the sum is 44.

The square root of 972291491 is about 31181.5889749063. The cubic root of 972291491 is about 990.6771855613.

The spelling of 972291491 in words is "nine hundred seventy-two million, two hundred ninety-one thousand, four hundred ninety-one".