190981969 has 8 divisors (see below), whose sum is σ = 193444160. Its totient is φ = 188535600.

The previous prime is 190981951. The next prime is 190981981. The reversal of 190981969 is 969189091.

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

It is a cyclic number.

It is not a de Polignac number, because 190981969 - 2¹⁷ = 190850897 is a prime.

It is a super-2 number, since 2×190981969² = 72948224966233922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190981909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21364 + ... + 28954.

It is an arithmetic number, because the mean of its divisors is an integer number (24180520).

Almost surely, 2^190981969 is an apocalyptic number.

It is an amenable number.

190981969 is a deficient number, since it is larger than the sum of its proper divisors (2462191).

190981969 is a wasteful number, since it uses less digits than its factorization.

190981969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911.

The product of its (nonzero) digits is 314928, while the sum is 52.

The square root of 190981969 is about 13819.6226070034. The cubic root of 190981969 is about 575.8783993320.

The spelling of 190981969 in words is "one hundred ninety million, nine hundred eighty-one thousand, nine hundred sixty-nine".