997281756 has 36 divisors (see below), whose sum is σ = 2529537192. Its totient is φ = 331289184.

The previous prime is 997281751. The next prime is 997281793. The reversal of 997281756 is 657182799.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997281751) 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 11 ways as a sum of consecutive naturals, for example, 36726 + ... + 57821.

It is an arithmetic number, because the mean of its divisors is an integer number (70264922).

Almost surely, 2^997281756 is an apocalyptic number.

It is an amenable number.

997281756 is an abundant number, since it is smaller than the sum of its proper divisors (1532255436).

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

997281756 is a wasteful number, since it uses less digits than its factorization.

997281756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94850 (or 94845 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 997281756 is about 31579.7681435441. The cubic root of 997281756 is about 999.0930964412.

The spelling of 997281756 in words is "nine hundred ninety-seven million, two hundred eighty-one thousand, seven hundred fifty-six".