189050981 has 16 divisors (see below), whose sum is σ = 218641920. Its totient is φ = 160118640.

The previous prime is 189050977. The next prime is 189051011.

189050981 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 189050981 - 2² = 189050977 is a prime.

It is a super-2 number, since 2×189050981² = 71480546834124722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189050881) 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, 321770 + ... + 322356.

It is an arithmetic number, because the mean of its divisors is an integer number (13665120).

Almost surely, 2^189050981 is an apocalyptic number.

It is an amenable number.

189050981 is a deficient number, since it is larger than the sum of its proper divisors (29590939).

189050981 is a wasteful number, since it uses less digits than its factorization.

189050981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 189050981 is about 13749.5811208924. The cubic root of 189050981 is about 573.9309497403.

The spelling of 189050981 in words is "one hundred eighty-nine million, fifty thousand, nine hundred eighty-one".