997443490 has 32 divisors (see below), whose sum is σ = 1849599360. Its totient is φ = 387043200.

The previous prime is 997443481. The next prime is 997443497. The reversal of 997443490 is 94344799.

It is not an unprimeable number, because it can be changed into a prime (997443497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66595 + ... + 80185.

It is an arithmetic number, because the mean of its divisors is an integer number (57799980).

Almost surely, 2^997443490 is an apocalyptic number.

997443490 is a deficient number, since it is larger than the sum of its proper divisors (852155870).

997443490 is a wasteful number, since it uses less digits than its factorization.

997443490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 997443490 is about 31582.3287615084. The cubic root of 997443490 is about 999.1471027731.

The spelling of 997443490 in words is "nine hundred ninety-seven million, four hundred forty-three thousand, four hundred ninety".