997671357 has 32 divisors (see below), whose sum is σ = 1534464000. Its totient is φ = 639966960.

The previous prime is 997671347. The next prime is 997671373. The reversal of 997671357 is 753176799.

It is not a de Polignac number, because 997671357 - 2⁷ = 997671229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997671307) 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 31 ways as a sum of consecutive naturals, for example, 146494 + ... + 153152.

It is an arithmetic number, because the mean of its divisors is an integer number (47952000).

Almost surely, 2^997671357 is an apocalyptic number.

997671357 is the 19977-th heptagonal number.

It is an amenable number.

997671357 is a deficient number, since it is larger than the sum of its proper divisors (536792643).

997671357 is a wasteful number, since it uses less digits than its factorization.

997671357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6878 (or 6872 counting only the distinct ones).

The product of its digits is 2500470, while the sum is 54.

The square root of 997671357 is about 31585.9360633811. The cubic root of 997671357 is about 999.2231823773.

It can be divided in two parts, 99767 and 1357, that added together give a square (101124 = 318²).

The spelling of 997671357 in words is "nine hundred ninety-seven million, six hundred seventy-one thousand, three hundred fifty-seven".