971604490 has 12 divisors (see below), whose sum is σ = 1749065526. Its totient is φ = 388602368.

The previous prime is 971604461. The next prime is 971604493. The reversal of 971604490 is 94406179.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 664969369 + 306635121 = 25787^2 + 17511^2 .

It is not an unprimeable number, because it can be changed into a prime (971604493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93642 + ... + 103498.

Almost surely, 2^971604490 is an apocalyptic number.

971604490 is a deficient number, since it is larger than the sum of its proper divisors (777461036).

971604490 is an frugal number, since it uses more digits than its factorization.

971604490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19721 (or 9864 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 971604490 is about 31170.5708962797. The cubic root of 971604490 is about 990.4437999341.

Multiplying 971604490 by its sum of digits (40), we get a square (38864179600 = 197140²).

The spelling of 971604490 in words is "nine hundred seventy-one million, six hundred four thousand, four hundred ninety".