190974217 has 12 divisors (see below), whose sum is σ = 222691476. Its totient is φ = 163296000.

The previous prime is 190974197. The next prime is 190974227. The reversal of 190974217 is 712479091.

It can be written as a sum of positive squares in 2 ways, for example, as 27415696 + 163558521 = 5236^2 + 12789^2 .

It is not a de Polignac number, because 190974217 - 2⁷ = 190974089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190974217.

It is not an unprimeable number, because it can be changed into a prime (190974227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16717 + ... + 25717.

It is an arithmetic number, because the mean of its divisors is an integer number (18557623).

Almost surely, 2^190974217 is an apocalyptic number.

It is an amenable number.

190974217 is a deficient number, since it is larger than the sum of its proper divisors (31717259).

190974217 is an equidigital number, since it uses as much as digits as its factorization.

190974217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9448 (or 9441 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 190974217 is about 13819.3421334013. The cubic root of 190974217 is about 575.8706075498.

It can be divided in two parts, 190974 and 217, that added together give a palindrome (191191).

The spelling of 190974217 in words is "one hundred ninety million, nine hundred seventy-four thousand, two hundred seventeen".