189056531 has 2 divisors, whose sum is σ = 189056532. Its totient is φ = 189056530.

The previous prime is 189056521. The next prime is 189056533. The reversal of 189056531 is 135650981.

It is a strong prime.

It is an emirp because it is prime and its reverse (135650981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189056531 is a prime.

It is a super-2 number, since 2×189056531² = 71484743827507922, which contains 22 as substring.

Together with 189056533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189056533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94528265 + 94528266.

It is an arithmetic number, because the mean of its divisors is an integer number (94528266).

Almost surely, 2^189056531 is an apocalyptic number.

189056531 is a deficient number, since it is larger than the sum of its proper divisors (1).

189056531 is an equidigital number, since it uses as much as digits as its factorization.

189056531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 189056531 is about 13749.7829437413. The cubic root of 189056531 is about 573.9365660131.

The spelling of 189056531 in words is "one hundred eighty-nine million, fifty-six thousand, five hundred thirty-one".