189796681 has 16 divisors (see below), whose sum is σ = 205611840. Its totient is φ = 174640320.

The previous prime is 189796639. The next prime is 189796697. The reversal of 189796681 is 186697981.

It is a cyclic number.

It is not a de Polignac number, because 189796681 - 2⁷ = 189796553 is a prime.

It is a super-2 number, since 2×189796681² = 72045560237231522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189796081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95211 + ... + 97183.

It is an arithmetic number, because the mean of its divisors is an integer number (12850740).

Almost surely, 2^189796681 is an apocalyptic number.

It is an amenable number.

189796681 is a deficient number, since it is larger than the sum of its proper divisors (15815159).

189796681 is a wasteful number, since it uses less digits than its factorization.

189796681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its digits is 1306368, while the sum is 55.

The square root of 189796681 is about 13776.6716227106. The cubic root of 189796681 is about 574.6845715461.

The spelling of 189796681 in words is "one hundred eighty-nine million, seven hundred ninety-six thousand, six hundred eighty-one".