189292981 has 2 divisors, whose sum is σ = 189292982. Its totient is φ = 189292980.

The previous prime is 189292969. The next prime is 189292993.

189292981 is nontrivially palindromic in base 10.

It is a balanced prime because it is at equal distance from previous prime (189292969) and next prime (189292993).

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 38862756 = 12265^2 + 6234^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 189292981 - 2⁷ = 189292853 is a prime.

It is a super-2 number, since 2×189292981² = 71663665311732722, which contains 22 as substring.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189292381) 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 as a sum of consecutive naturals, namely, 94646490 + 94646491.

It is an arithmetic number, because the mean of its divisors is an integer number (94646491).

Almost surely, 2^189292981 is an apocalyptic number.

It is an amenable number.

189292981 is a deficient number, since it is larger than the sum of its proper divisors (1).

189292981 is an equidigital number, since it uses as much as digits as its factorization.

189292981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 49.

The square root of 189292981 is about 13758.3785745269. The cubic root of 189292981 is about 574.1757374467.

The spelling of 189292981 in words is "one hundred eighty-nine million, two hundred ninety-two thousand, nine hundred eighty-one".