190931 has 8 divisors (see below), whose sum is σ = 216720. Its totient is φ = 166752.

The previous prime is 190921. The next prime is 190979. The reversal of 190931 is 139091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190931 is a prime.

It is a super-2 number, since 2×190931² = 72909293522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190897 and 190906.

It is not an unprimeable number, because it can be changed into a prime (190901) 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 in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 633.

It is an arithmetic number, because the mean of its divisors is an integer number (27090).

2¹⁹⁰⁹³¹ is an apocalyptic number.

190931 is a deficient number, since it is larger than the sum of its proper divisors (25789).

190931 is a wasteful number, since it uses less digits than its factorization.

190931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 190931 is about 436.9565195760. The cubic root of 190931 is about 57.5827164901.

The spelling of 190931 in words is "one hundred ninety thousand, nine hundred thirty-one".