190902137 has 4 divisors (see below), whose sum is σ = 191400960. Its totient is φ = 190403316.

The previous prime is 190902121. The next prime is 190902149. The reversal of 190902137 is 731209091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 731209091 = 19 ⋅38484689.

It is a cyclic number.

It is not a de Polignac number, because 190902137 - 2⁴ = 190902121 is a prime.

It is a super-2 number, since 2×190902137² = 72887251822333538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190902337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248837 + ... + 249602.

It is an arithmetic number, because the mean of its divisors is an integer number (47850240).

Almost surely, 2^190902137 is an apocalyptic number.

It is an amenable number.

190902137 is a deficient number, since it is larger than the sum of its proper divisors (498823).

190902137 is an equidigital number, since it uses as much as digits as its factorization.

190902137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498822.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 190902137 is about 13816.7339483686. The cubic root of 190902137 is about 575.7981475472.

The spelling of 190902137 in words is "one hundred ninety million, nine hundred two thousand, one hundred thirty-seven".