190403945 has 4 divisors (see below), whose sum is σ = 228484740. Its totient is φ = 152323152.

The previous prime is 190403923. The next prime is 190403963. The reversal of 190403945 is 549304091.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117267241 + 73136704 = 10829^2 + 8552^2 .

It is a cyclic number.

It is not a de Polignac number, because 190403945 - 2¹⁰ = 190402921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19040390 + ... + 19040399.

It is an arithmetic number, because the mean of its divisors is an integer number (57121185).

Almost surely, 2^190403945 is an apocalyptic number.

It is an amenable number.

190403945 is a deficient number, since it is larger than the sum of its proper divisors (38080795).

190403945 is an equidigital number, since it uses as much as digits as its factorization.

190403945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38080794.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 190403945 is about 13798.6935975838. The cubic root of 190403945 is about 575.2968297293.

The spelling of 190403945 in words is "one hundred ninety million, four hundred three thousand, nine hundred forty-five".