997131742 has 64 divisors (see below), whose sum is σ = 1703462400. Its totient is φ = 435473280.

The previous prime is 997131731. The next prime is 997131797. The reversal of 997131742 is 247131799.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 3145368 + ... + 3145684.

It is an arithmetic number, because the mean of its divisors is an integer number (26616600).

Almost surely, 2^997131742 is an apocalyptic number.

997131742 is the 25783-rd pentagonal number.

997131742 is a deficient number, since it is larger than the sum of its proper divisors (706330658).

997131742 is a wasteful number, since it uses less digits than its factorization.

997131742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481.

The product of its digits is 95256, while the sum is 43.

The square root of 997131742 is about 31577.3928942844. The cubic root of 997131742 is about 999.0429984402.

The spelling of 997131742 in words is "nine hundred ninety-seven million, one hundred thirty-one thousand, seven hundred forty-two".