190691894 has 8 divisors (see below), whose sum is σ = 290886120. Its totient is φ = 93729856.

The previous prime is 190691887. The next prime is 190691899. The reversal of 190691894 is 498196091.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190691899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807899 + ... + 808134.

It is an arithmetic number, because the mean of its divisors is an integer number (36360765).

Almost surely, 2^190691894 is an apocalyptic number.

190691894 is a deficient number, since it is larger than the sum of its proper divisors (100194226).

190691894 is a wasteful number, since it uses less digits than its factorization.

190691894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616094.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 190691894 is about 13809.1235782724. The cubic root of 190691894 is about 575.5866919121.

The spelling of 190691894 in words is "one hundred ninety million, six hundred ninety-one thousand, eight hundred ninety-four".