190388369 has 2 divisors, whose sum is σ = 190388370. Its totient is φ = 190388368.

The previous prime is 190388357. The next prime is 190388371. The reversal of 190388369 is 963883091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165508225 + 24880144 = 12865^2 + 4988^2 .

It is a cyclic number.

It is not a de Polignac number, because 190388369 - 2⁴ = 190388353 is a prime.

It is a super-2 number, since 2×190388369² = 72495462100960322, which contains 22 as substring.

Together with 190388371, 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 (190388309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95194184 + 95194185.

It is an arithmetic number, because the mean of its divisors is an integer number (95194185).

Almost surely, 2^190388369 is an apocalyptic number.

It is an amenable number.

190388369 is a deficient number, since it is larger than the sum of its proper divisors (1).

190388369 is an equidigital number, since it uses as much as digits as its factorization.

190388369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 190388369 is about 13798.1291847844. The cubic root of 190388369 is about 575.2811419105.

The spelling of 190388369 in words is "one hundred ninety million, three hundred eighty-eight thousand, three hundred sixty-nine".