1997911204 has 9 divisors (see below), whose sum is σ = 3496501057. Its totient is φ = 998910904.

The previous prime is 1997911133. The next prime is 1997911207. The reversal of 1997911204 is 4021197991.

The square root of 1997911204 is 44698.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 316911204 + 1681000000 = 17802^2 + 41000^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997911207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 78222 + ... + 100570.

Almost surely, 2^1997911204 is an apocalyptic number.

1997911204 is the 44698-th square number.

It is an amenable number.

1997911204 is a deficient number, since it is larger than the sum of its proper divisors (1498589853).

1997911204 is an frugal number, since it uses more digits than its factorization.

1997911204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44702 (or 22351 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The cubic root of 1997911204 is about 1259.4822774335.

The spelling of 1997911204 in words is "one billion, nine hundred ninety-seven million, nine hundred eleven thousand, two hundred four".