997471889 has 8 divisors (see below), whose sum is σ = 1102066560. Its totient is φ = 897979456.

The previous prime is 997471847. The next prime is 997471897. The reversal of 997471889 is 988174799.

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 997471889 - 2²⁸ = 729036433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997476889) 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, 1275149 + ... + 1275930.

It is an arithmetic number, because the mean of its divisors is an integer number (137758320).

Almost surely, 2^997471889 is an apocalyptic number.

It is an amenable number.

997471889 is a deficient number, since it is larger than the sum of its proper divisors (104594671).

997471889 is a wasteful number, since it uses less digits than its factorization.

997471889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551119.

The product of its digits is 9144576, while the sum is 62.

The square root of 997471889 is about 31582.7783609992. The cubic root of 997471889 is about 999.1565851848.

The spelling of 997471889 in words is "nine hundred ninety-seven million, four hundred seventy-one thousand, eight hundred eighty-nine".