972729431 has 4 divisors (see below), whose sum is σ = 972807264. Its totient is φ = 972651600.

The previous prime is 972729427. The next prime is 972729479. The reversal of 972729431 is 134927279.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 972729431 - 2² = 972729427 is a prime.

It is a super-2 number, since 2×972729431² = 1892405091867167522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972729421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455 + ... + 46736.

It is an arithmetic number, because the mean of its divisors is an integer number (243201816).

Almost surely, 2^972729431 is an apocalyptic number.

972729431 is a deficient number, since it is larger than the sum of its proper divisors (77833).

972729431 is a wasteful number, since it uses less digits than its factorization.

972729431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77832.

The product of its digits is 190512, while the sum is 44.

The square root of 972729431 is about 31188.6105974601. The cubic root of 972729431 is about 990.8259036661.

The spelling of 972729431 in words is "nine hundred seventy-two million, seven hundred twenty-nine thousand, four hundred thirty-one".