189631965 has 8 divisors (see below), whose sum is σ = 303411168. Its totient is φ = 101137040.

The previous prime is 189631963. The next prime is 189631969. The reversal of 189631965 is 569136981.

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

It is not a de Polignac number, because 189631965 - 2¹ = 189631963 is a prime.

It is a super-2 number, since 2×189631965² = 71920564299522450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189631963) 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 7 ways as a sum of consecutive naturals, for example, 6321051 + ... + 6321080.

It is an arithmetic number, because the mean of its divisors is an integer number (37926396).

Almost surely, 2^189631965 is an apocalyptic number.

189631965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189631965 is a deficient number, since it is larger than the sum of its proper divisors (113779203).

189631965 is a wasteful number, since it uses less digits than its factorization.

189631965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12642139.

The product of its digits is 349920, while the sum is 48.

The square root of 189631965 is about 13770.6922483948. The cubic root of 189631965 is about 574.5182758023.

The spelling of 189631965 in words is "one hundred eighty-nine million, six hundred thirty-one thousand, nine hundred sixty-five".