189671691 has 16 divisors (see below), whose sum is σ = 276117120. Its totient is φ = 114856320.

The previous prime is 189671689. The next prime is 189671693. The reversal of 189671691 is 196176981.

It is an interprime number because it is at equal distance from previous prime (189671689) and next prime (189671693).

It is not a de Polignac number, because 189671691 - 2¹ = 189671689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189671691.

It is not an unprimeable number, because it can be changed into a prime (189671693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71395 + ... + 74003.

It is an arithmetic number, because the mean of its divisors is an integer number (17257320).

Almost surely, 2^189671691 is an apocalyptic number.

189671691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189671691 is a deficient number, since it is larger than the sum of its proper divisors (86445429).

189671691 is a wasteful number, since it uses less digits than its factorization.

189671691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826.

The product of its digits is 163296, while the sum is 48.

The square root of 189671691 is about 13772.1345840069. The cubic root of 189671691 is about 574.5583916120.

The spelling of 189671691 in words is "one hundred eighty-nine million, six hundred seventy-one thousand, six hundred ninety-one".