189698281 has 2 divisors, whose sum is σ = 189698282. Its totient is φ = 189698280.

The previous prime is 189698279. The next prime is 189698287. The reversal of 189698281 is 182896981.

189698281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168584256 + 21114025 = 12984^2 + 4595^2 .

It is a cyclic number.

It is not a de Polignac number, because 189698281 - 2¹ = 189698279 is a prime.

It is a super-2 number, since 2×189698281² = 71970875628709922, which contains 22 as substring.

Together with 189698279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (189698287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94849140 + 94849141.

It is an arithmetic number, because the mean of its divisors is an integer number (94849141).

Almost surely, 2^189698281 is an apocalyptic number.

It is an amenable number.

189698281 is a deficient number, since it is larger than the sum of its proper divisors (1).

189698281 is an equidigital number, since it uses as much as digits as its factorization.

189698281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 52.

The square root of 189698281 is about 13773.0999052501. The cubic root of 189698281 is about 574.5852393960.

The spelling of 189698281 in words is "one hundred eighty-nine million, six hundred ninety-eight thousand, two hundred eighty-one".