189172223397 has 24 divisors (see below), whose sum is σ = 282084977408. Its totient is φ = 122037192000.

The previous prime is 189172223323. The next prime is 189172223431. The reversal of 189172223397 is 793322271981.

It is a happy number.

189172223397 is a `hidden beast` number, since 1 + 89 + 1 + 7 + 222 + 339 + 7 = 666.

It is not a de Polignac number, because 189172223397 - 2¹⁰ = 189172222373 is a prime.

It is a super-2 number, since 2×189172223397² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189172223797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6693897 + ... + 6722097.

Almost surely, 2^189172223397 is an apocalyptic number.

It is an amenable number.

189172223397 is a deficient number, since it is larger than the sum of its proper divisors (92912754011).

189172223397 is a wasteful number, since it uses less digits than its factorization.

189172223397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52281 (or 52278 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 189172223397 in words is "one hundred eighty-nine billion, one hundred seventy-two million, two hundred twenty-three thousand, three hundred ninety-seven".