997683870 has 32 divisors (see below), whose sum is σ = 2395373472. Its totient is φ = 265945472.

The previous prime is 997683851. The next prime is 997683871. The reversal of 997683870 is 78386799.

It is a self number, because there is not a number n which added to its sum of digits gives 997683870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997683871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101284 + ... + 110696.

It is an arithmetic number, because the mean of its divisors is an integer number (74855421).

Almost surely, 2^997683870 is an apocalyptic number.

997683870 is an abundant number, since it is smaller than the sum of its proper divisors (1397689602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997683870 is a wasteful number, since it uses less digits than its factorization.

997683870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12956.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 997683870 is about 31586.1341414235. The cubic root of 997683870 is about 999.2273598476.

The spelling of 997683870 in words is "nine hundred ninety-seven million, six hundred eighty-three thousand, eight hundred seventy".