190813669 has 4 divisors (see below), whose sum is σ = 191001580. Its totient is φ = 190625760.

The previous prime is 190813657. The next prime is 190813687. The reversal of 190813669 is 966318091.

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 52751169 + 138062500 = 7263^2 + 11750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190813669 is a prime.

It is a super-2 number, since 2×190813669² = 72819712554483122, 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 (190814669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92424 + ... + 94465.

It is an arithmetic number, because the mean of its divisors is an integer number (47750395).

Almost surely, 2^190813669 is an apocalyptic number.

It is an amenable number.

190813669 is a deficient number, since it is larger than the sum of its proper divisors (187911).

190813669 is a wasteful number, since it uses less digits than its factorization.

190813669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187910.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 190813669 is about 13813.5320971864. The cubic root of 190813669 is about 575.7091882124.

The spelling of 190813669 in words is "one hundred ninety million, eight hundred thirteen thousand, six hundred sixty-nine".