997090402 has 16 divisors (see below), whose sum is σ = 1864688832. Its totient is φ = 388476720.

The previous prime is 997090399. The next prime is 997090403. The reversal of 997090402 is 204090799.

It is not an unprimeable number, because it can be changed into a prime (997090403) 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, 3237153 + ... + 3237460.

It is an arithmetic number, because the mean of its divisors is an integer number (116543052).

Almost surely, 2^997090402 is an apocalyptic number.

997090402 is a deficient number, since it is larger than the sum of its proper divisors (867598430).

997090402 is a wasteful number, since it uses less digits than its factorization.

997090402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474633.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 997090402 is about 31576.7383052778. The cubic root of 997090402 is about 999.0291918365.

The spelling of 997090402 in words is "nine hundred ninety-seven million, ninety thousand, four hundred two".