189779631 has 8 divisors (see below), whose sum is σ = 253103664. Its totient is φ = 126487680.

The previous prime is 189779621. The next prime is 189779651. The reversal of 189779631 is 136977981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189779631 - 2⁵ = 189779599 is a prime.

It is a super-2 number, since 2×189779631² = 72032616684992322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189779621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16471 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (31637958).

Almost surely, 2^189779631 is an apocalyptic number.

189779631 is a deficient number, since it is larger than the sum of its proper divisors (63324033).

189779631 is an equidigital number, since it uses as much as digits as its factorization.

189779631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16041.

The product of its digits is 571536, while the sum is 51.

The square root of 189779631 is about 13776.0528091322. The cubic root of 189779631 is about 574.6673624897.

The spelling of 189779631 in words is "one hundred eighty-nine million, seven hundred seventy-nine thousand, six hundred thirty-one".