189898967 has 2 divisors, whose sum is σ = 189898968. Its totient is φ = 189898966.

The previous prime is 189898949. The next prime is 189898981. The reversal of 189898967 is 769898981.

189898967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189898967 is a prime.

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 (189898367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94949483 + 94949484.

It is an arithmetic number, because the mean of its divisors is an integer number (94949484).

Almost surely, 2^189898967 is an apocalyptic number.

189898967 is a deficient number, since it is larger than the sum of its proper divisors (1).

189898967 is an equidigital number, since it uses as much as digits as its factorization.

189898967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 65.

The square root of 189898967 is about 13780.3834126631. The cubic root of 189898967 is about 574.7877901223.

The spelling of 189898967 in words is "one hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred sixty-seven".