190493917 has 4 divisors (see below), whose sum is σ = 190529820. Its totient is φ = 190458016.

The previous prime is 190493903. The next prime is 190493929. The reversal of 190493917 is 719394091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111746041 + 78747876 = 10571^2 + 8874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190493917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190493417) 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, 8242 + ... + 21187.

It is an arithmetic number, because the mean of its divisors is an integer number (47632455).

Almost surely, 2^190493917 is an apocalyptic number.

It is an amenable number.

190493917 is a deficient number, since it is larger than the sum of its proper divisors (35903).

190493917 is an equidigital number, since it uses as much as digits as its factorization.

190493917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35902.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 190493917 is about 13801.9533762435. The cubic root of 190493917 is about 575.3874308907.

The spelling of 190493917 in words is "one hundred ninety million, four hundred ninety-three thousand, nine hundred seventeen".