189079737889 has 9 divisors (see below), whose sum is σ = 219953440017. Its totient is φ = 162065737764.

The previous prime is 189079737883. The next prime is 189079737923. The reversal of 189079737889 is 988737970981.

The square root of 189079737889 is 434833.

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

It is not a de Polignac number, because 189079737889 - 2³ = 189079737881 is a prime.

It is a super-2 number, since 2×189079737889² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189079737881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3012772 + ... + 3074890.

It is an arithmetic number, because the mean of its divisors is an integer number (24439271113).

Almost surely, 2^189079737889 is an apocalyptic number.

189079737889 is the 434833-rd square number.

189079737889 is the 217417-th centered octagonal number.

It is an amenable number.

189079737889 is a deficient number, since it is larger than the sum of its proper divisors (30873702128).

189079737889 is an frugal number, since it uses more digits than its factorization.

189079737889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124252 (or 62126 counting only the distinct ones).

The product of its (nonzero) digits is 384072192, while the sum is 76.

The spelling of 189079737889 in words is "one hundred eighty-nine billion, seventy-nine million, seven hundred thirty-seven thousand, eight hundred eighty-nine".