997472769 has 8 divisors (see below), whose sum is σ = 1335139680. Its totient is φ = 662393856.

The previous prime is 997472761. The next prime is 997472813. The reversal of 997472769 is 967274799.

It is a happy number.

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

It is not a de Polignac number, because 997472769 - 2³ = 997472761 is a prime.

It is a super-2 number, since 2×997472769² = 1989903849793054722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (997472761) 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, 646099 + ... + 647640.

It is an arithmetic number, because the mean of its divisors is an integer number (166892460).

Almost surely, 2^997472769 is an apocalyptic number.

It is an amenable number.

997472769 is a deficient number, since it is larger than the sum of its proper divisors (337666911).

997472769 is a wasteful number, since it uses less digits than its factorization.

997472769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293999.

The product of its digits is 12002256, while the sum is 60.

The square root of 997472769 is about 31582.7922926394. The cubic root of 997472769 is about 999.1568790134.

The spelling of 997472769 in words is "nine hundred ninety-seven million, four hundred seventy-two thousand, seven hundred sixty-nine".