189691463 has 8 divisors (see below), whose sum is σ = 205178400. Its totient is φ = 174332448.

The previous prime is 189691451. The next prime is 189691477. The reversal of 189691463 is 364196981.

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

It is a cyclic number.

It is not a de Polignac number, because 189691463 - 2⁸ = 189691207 is a prime.

It is a super-2 number, since 2×189691463² = 71965702270160738, which 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 (189691063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28883 + ... + 34836.

It is an arithmetic number, because the mean of its divisors is an integer number (25647300).

Almost surely, 2^189691463 is an apocalyptic number.

189691463 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

189691463 is a deficient number, since it is larger than the sum of its proper divisors (15486937).

189691463 is a wasteful number, since it uses less digits than its factorization.

189691463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63961.

The product of its digits is 279936, while the sum is 47.

The square root of 189691463 is about 13772.8523915709. The cubic root of 189691463 is about 574.5783555362.

The spelling of 189691463 in words is "one hundred eighty-nine million, six hundred ninety-one thousand, four hundred sixty-three".