997147574 has 4 divisors (see below), whose sum is σ = 1495721364. Its totient is φ = 498573786.

The previous prime is 997147573. The next prime is 997147577. The reversal of 997147574 is 475741799.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997147573) 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 as a sum of consecutive naturals, namely, 249286892 + ... + 249286895.

It is an arithmetic number, because the mean of its divisors is an integer number (373930341).

Almost surely, 2^997147574 is an apocalyptic number.

997147574 is a deficient number, since it is larger than the sum of its proper divisors (498573790).

997147574 is a wasteful number, since it uses less digits than its factorization.

997147574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498573789.

The product of its digits is 2222640, while the sum is 53.

The square root of 997147574 is about 31577.6435789626. The cubic root of 997147574 is about 999.0482858609.

The spelling of 997147574 in words is "nine hundred ninety-seven million, one hundred forty-seven thousand, five hundred seventy-four".