190893691 has 4 divisors (see below), whose sum is σ = 197051584. Its totient is φ = 184735800.

The previous prime is 190893667. The next prime is 190893709. The reversal of 190893691 is 196398091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190893691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190893601) 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, 3078900 + ... + 3078961.

It is an arithmetic number, because the mean of its divisors is an integer number (49262896).

Almost surely, 2^190893691 is an apocalyptic number.

190893691 is a deficient number, since it is larger than the sum of its proper divisors (6157893).

190893691 is an equidigital number, since it uses as much as digits as its factorization.

190893691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157892.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 190893691 is about 13816.4283011204. The cubic root of 190893691 is about 575.7896558265.

The spelling of 190893691 in words is "one hundred ninety million, eight hundred ninety-three thousand, six hundred ninety-one".