190690845 has 16 divisors (see below), whose sum is σ = 308253120. Its totient is φ = 100652544.

The previous prime is 190690831. The next prime is 190690847. The reversal of 190690845 is 548096091.

It is not a de Polignac number, because 190690845 - 2⁶ = 190690781 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 190690797 and 190690806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190690847) 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 15 ways as a sum of consecutive naturals, for example, 64075 + ... + 66984.

It is an arithmetic number, because the mean of its divisors is an integer number (19265820).

Almost surely, 2^190690845 is an apocalyptic number.

190690845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190690845 is a deficient number, since it is larger than the sum of its proper divisors (117562275).

190690845 is a wasteful number, since it uses less digits than its factorization.

190690845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131164.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 190690845 is about 13809.0855960849. The cubic root of 190690845 is about 575.5856364721.

The spelling of 190690845 in words is "one hundred ninety million, six hundred ninety thousand, eight hundred forty-five".