190439207 has 4 divisors (see below), whose sum is σ = 217644816. Its totient is φ = 163233600.

The previous prime is 190439203. The next prime is 190439209. The reversal of 190439207 is 702934091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702934091 = 25147 ⋅27953.

It is a cyclic number.

It is not a de Polignac number, because 190439207 - 2² = 190439203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190439203) 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, 13602794 + ... + 13602807.

It is an arithmetic number, because the mean of its divisors is an integer number (54411204).

Almost surely, 2^190439207 is an apocalyptic number.

190439207 is a deficient number, since it is larger than the sum of its proper divisors (27205609).

190439207 is an equidigital number, since it uses as much as digits as its factorization.

190439207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27205608.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 190439207 is about 13799.9712680860. The cubic root of 190439207 is about 575.3323417117.

The spelling of 190439207 in words is "one hundred ninety million, four hundred thirty-nine thousand, two hundred seven".