189019969 has 2 divisors, whose sum is σ = 189019970. Its totient is φ = 189019968.

The previous prime is 189019937. The next prime is 189019981. The reversal of 189019969 is 969910981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137007025 + 52012944 = 11705^2 + 7212^2 .

It is a cyclic number.

It is not a de Polignac number, because 189019969 - 2⁵ = 189019937 is a prime.

It is a super-2 number, since 2×189019969² = 71457097361521922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189019169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94509984 + 94509985.

It is an arithmetic number, because the mean of its divisors is an integer number (94509985).

Almost surely, 2^189019969 is an apocalyptic number.

It is an amenable number.

189019969 is a deficient number, since it is larger than the sum of its proper divisors (1).

189019969 is an equidigital number, since it uses as much as digits as its factorization.

189019969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 52.

The square root of 189019969 is about 13748.4533311933. The cubic root of 189019969 is about 573.8995654018.

The spelling of 189019969 in words is "one hundred eighty-nine million, nineteen thousand, nine hundred sixty-nine".