190087969 has 2 divisors, whose sum is σ = 190087970. Its totient is φ = 190087968.

The previous prime is 190087949. The next prime is 190087973. The reversal of 190087969 is 969780091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171295744 + 18792225 = 13088^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 190087969 - 2⁷ = 190087841 is a prime.

It is a super-2 number, since 2×190087969² = 72266871917089922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190087949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95043984 + 95043985.

It is an arithmetic number, because the mean of its divisors is an integer number (95043985).

Almost surely, 2^190087969 is an apocalyptic number.

It is an amenable number.

190087969 is a deficient number, since it is larger than the sum of its proper divisors (1).

190087969 is an equidigital number, since it uses as much as digits as its factorization.

190087969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 190087969 is about 13787.2393538373. The cubic root of 190087969 is about 574.9784178415.

The spelling of 190087969 in words is "one hundred ninety million, eighty-seven thousand, nine hundred sixty-nine".