997192489942 has 8 divisors (see below), whose sum is σ = 1631769529032. Its totient is φ = 453269313600.

The previous prime is 997192489939. The next prime is 997192489957. The reversal of 997192489942 is 249984291799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22663465659 + ... + 22663465702.

It is an arithmetic number, because the mean of its divisors is an integer number (203971191129).

Almost surely, 2^997192489942 is an apocalyptic number.

997192489942 is a deficient number, since it is larger than the sum of its proper divisors (634577039090).

997192489942 is a wasteful number, since it uses less digits than its factorization.

997192489942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45326931374.

The product of its digits is 211631616, while the sum is 73.

The spelling of 997192489942 in words is "nine hundred ninety-seven billion, one hundred ninety-two million, four hundred eighty-nine thousand, nine hundred forty-two".