189797892964 has 9 divisors (see below), whose sum is σ = 332147837497. Its totient is φ = 94898510824.

The previous prime is 189797892899. The next prime is 189797892967. The reversal of 189797892964 is 469298797981.

The square root of 189797892964 is 435658.

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., 56046774564 + 133751118400 = 236742^2 + 365720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189797892967) 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, 762402 + ... + 980230.

Almost surely, 2^189797892964 is an apocalyptic number.

189797892964 is the 435658-th square number.

It is an amenable number.

189797892964 is a deficient number, since it is larger than the sum of its proper divisors (142349944533).

189797892964 is an frugal number, since it uses more digits than its factorization.

189797892964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435662 (or 217831 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 79.

The spelling of 189797892964 in words is "one hundred eighty-nine billion, seven hundred ninety-seven million, eight hundred ninety-two thousand, nine hundred sixty-four".