190474649 has 4 divisors (see below), whose sum is σ = 194904336. Its totient is φ = 186044964.

The previous prime is 190474621. The next prime is 190474651. The reversal of 190474649 is 946474091.

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 190474649 - 2²⁰ = 189426073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190474679) 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, 2214779 + ... + 2214864.

It is an arithmetic number, because the mean of its divisors is an integer number (48726084).

Almost surely, 2^190474649 is an apocalyptic number.

It is an amenable number.

190474649 is a deficient number, since it is larger than the sum of its proper divisors (4429687).

190474649 is an equidigital number, since it uses as much as digits as its factorization.

190474649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4429686.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 190474649 is about 13801.2553414535. The cubic root of 190474649 is about 575.3680305532.

The spelling of 190474649 in words is "one hundred ninety million, four hundred seventy-four thousand, six hundred forty-nine".