189124981 has 2 divisors, whose sum is σ = 189124982. Its totient is φ = 189124980.

The previous prime is 189124967. The next prime is 189125029. The reversal of 189124981 is 189421981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153016900 + 36108081 = 12370^2 + 6009^2 .

It is a cyclic number.

It is not a de Polignac number, because 189124981 - 2¹¹ = 189122933 is a prime.

It is a super-2 number, since 2×189124981² = 71536516876500722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189124931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94562490 + 94562491.

It is an arithmetic number, because the mean of its divisors is an integer number (94562491).

Almost surely, 2^189124981 is an apocalyptic number.

It is an amenable number.

189124981 is a deficient number, since it is larger than the sum of its proper divisors (1).

189124981 is an equidigital number, since it uses as much as digits as its factorization.

189124981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 43.

The square root of 189124981 is about 13752.2718486801. The cubic root of 189124981 is about 574.0058243409.

The spelling of 189124981 in words is "one hundred eighty-nine million, one hundred twenty-four thousand, nine hundred eighty-one".