997623042 has 16 divisors (see below), whose sum is σ = 2148726720. Its totient is φ = 306960912.

The previous prime is 997623031. The next prime is 997623043. The reversal of 997623042 is 240326799.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 997622985 and 997623003.

It is not an unprimeable number, because it can be changed into a prime (997623043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6394942 + ... + 6395097.

It is an arithmetic number, because the mean of its divisors is an integer number (134295420).

Almost surely, 2^997623042 is an apocalyptic number.

997623042 is an abundant number, since it is smaller than the sum of its proper divisors (1151103678).

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

997623042 is a wasteful number, since it uses less digits than its factorization.

997623042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12790057.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 997623042 is about 31585.1712358822. The cubic root of 997623042 is about 999.2070520664.

The spelling of 997623042 in words is "nine hundred ninety-seven million, six hundred twenty-three thousand, forty-two".