189962281 has 2 divisors, whose sum is σ = 189962282. Its totient is φ = 189962280.

The previous prime is 189962249. The next prime is 189962287. The reversal of 189962281 is 182269981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180096400 + 9865881 = 13420^2 + 3141^2 .

It is an emirp because it is prime and its reverse (182269981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189962281 - 2⁵ = 189962249 is a prime.

It is a super-2 number, since 2×189962281² = 72171336405445922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189962287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94981140 + 94981141.

It is an arithmetic number, because the mean of its divisors is an integer number (94981141).

Almost surely, 2^189962281 is an apocalyptic number.

It is an amenable number.

189962281 is a deficient number, since it is larger than the sum of its proper divisors (1).

189962281 is an equidigital number, since it uses as much as digits as its factorization.

189962281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 189962281 is about 13782.6804722449. The cubic root of 189962281 is about 574.8516628068.

The spelling of 189962281 in words is "one hundred eighty-nine million, nine hundred sixty-two thousand, two hundred eighty-one".