190643494 has 4 divisors (see below), whose sum is σ = 285965244. Its totient is φ = 95321746.

The previous prime is 190643461. The next prime is 190643501. The reversal of 190643494 is 494346091.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 47660872 + ... + 47660875.

It is an arithmetic number, because the mean of its divisors is an integer number (71491311).

Almost surely, 2^190643494 is an apocalyptic number.

190643494 is a deficient number, since it is larger than the sum of its proper divisors (95321750).

190643494 is an equidigital number, since it uses as much as digits as its factorization.

190643494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95321749.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 190643494 is about 13807.3710024755. The cubic root of 190643494 is about 575.5379907454.

The spelling of 190643494 in words is "one hundred ninety million, six hundred forty-three thousand, four hundred ninety-four".