997913736 has 128 divisors (see below), whose sum is σ = 2947104000. Its totient is φ = 311786496.

The previous prime is 997913713. The next prime is 997913747. The reversal of 997913736 is 637319799.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1317870 + ... + 1318626.

It is an arithmetic number, because the mean of its divisors is an integer number (23024250).

Almost surely, 2^997913736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997913736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473552000).

997913736 is an abundant number, since it is smaller than the sum of its proper divisors (1949190264).

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

997913736 is a wasteful number, since it uses less digits than its factorization.

997913736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1138 counting only the distinct ones).

The product of its digits is 1928934, while the sum is 54.

The square root of 997913736 is about 31589.7726487545. The cubic root of 997913736 is about 999.3040944945.

The spelling of 997913736 in words is "nine hundred ninety-seven million, nine hundred thirteen thousand, seven hundred thirty-six".