190923869 has 4 divisors (see below), whose sum is σ = 191032380. Its totient is φ = 190815360.

The previous prime is 190923853. The next prime is 190923871. The reversal of 190923869 is 968329091.

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 157803844 + 33120025 = 12562^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 190923869 - 2⁴ = 190923853 is a prime.

It is a super-2 number, since 2×190923869² = 72903847507858322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190923809) 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 3 ways as a sum of consecutive naturals, for example, 51572 + ... + 55149.

It is an arithmetic number, because the mean of its divisors is an integer number (47758095).

Almost surely, 2^190923869 is an apocalyptic number.

It is an amenable number.

190923869 is a deficient number, since it is larger than the sum of its proper divisors (108511).

190923869 is a wasteful number, since it uses less digits than its factorization.

190923869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108510.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 190923869 is about 13817.5203636543. The cubic root of 190923869 is about 575.8199960377.

The spelling of 190923869 in words is "one hundred ninety million, nine hundred twenty-three thousand, eight hundred sixty-nine".