997671356 has 48 divisors (see below), whose sum is σ = 1946609280. Its totient is φ = 443574720.

The previous prime is 997671347. The next prime is 997671373. The reversal of 997671356 is 653176799.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 997671298 and 997671307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588446 + ... + 590138.

It is an arithmetic number, because the mean of its divisors is an integer number (40554360).

Almost surely, 2^997671356 is an apocalyptic number.

It is an amenable number.

997671356 is a deficient number, since it is larger than the sum of its proper divisors (948937924).

997671356 is a wasteful number, since it uses less digits than its factorization.

997671356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1992 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 53.

The square root of 997671356 is about 31585.9360475513. The cubic root of 997671356 is about 999.2231820435.

The spelling of 997671356 in words is "nine hundred ninety-seven million, six hundred seventy-one thousand, three hundred fifty-six".