997351756 has 12 divisors (see below), whose sum is σ = 1752003792. Its totient is φ = 496779248.

The previous prime is 997351741. The next prime is 997351757. The reversal of 997351756 is 657153799.

It is a happy number.

997351756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (997351757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472975 + ... + 475078.

It is an arithmetic number, because the mean of its divisors is an integer number (146000316).

Almost surely, 2^997351756 is an apocalyptic number.

997351756 is the 19974-th centered pentagonal number.

It is an amenable number.

997351756 is a deficient number, since it is larger than the sum of its proper divisors (754652036).

997351756 is a wasteful number, since it uses less digits than its factorization.

997351756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948320 (or 948318 counting only the distinct ones).

The product of its digits is 1786050, while the sum is 52.

The square root of 997351756 is about 31580.8764286237. The cubic root of 997351756 is about 999.1164716075.

The spelling of 997351756 in words is "nine hundred ninety-seven million, three hundred fifty-one thousand, seven hundred fifty-six".