194320657 has 4 divisors (see below), whose sum is σ = 204548080. Its totient is φ = 184093236.

The previous prime is 194320649. The next prime is 194320673. The reversal of 194320657 is 756023491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 194320657 - 2³ = 194320649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194320057) 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, 5113683 + ... + 5113720.

It is an arithmetic number, because the mean of its divisors is an integer number (51137020).

Almost surely, 2^194320657 is an apocalyptic number.

It is an amenable number.

194320657 is a deficient number, since it is larger than the sum of its proper divisors (10227423).

194320657 is a wasteful number, since it uses less digits than its factorization.

194320657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227422.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 194320657 is about 13939.8944400594. The cubic root of 194320657 is about 579.2148084912.

The spelling of 194320657 in words is "one hundred ninety-four million, three hundred twenty thousand, six hundred fifty-seven".