195185090 has 16 divisors (see below), whose sum is σ = 351543672. Its totient is φ = 78027264.

The previous prime is 195185059. The next prime is 195185113. The reversal of 195185090 is 90581591.

It can be written as a sum of positive squares in 4 ways, for example, as 188980009 + 6205081 = 13747^2 + 2491^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15332 + ... + 25008.

Almost surely, 2^195185090 is an apocalyptic number.

195185090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195185090 is a deficient number, since it is larger than the sum of its proper divisors (156358582).

195185090 is a wasteful number, since it uses less digits than its factorization.

195185090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11701.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 195185090 is about 13970.8657569959. The cubic root of 195185090 is about 580.0724146604.

The spelling of 195185090 in words is "one hundred ninety-five million, one hundred eighty-five thousand, ninety".