190949639 has 4 divisors (see below), whose sum is σ = 200999640. Its totient is φ = 180899640.

The previous prime is 190949623. The next prime is 190949653. The reversal of 190949639 is 936949091.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 190949639 - 2⁴ = 190949623 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 (190949699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5024972 + ... + 5025009.

It is an arithmetic number, because the mean of its divisors is an integer number (50249910).

Almost surely, 2^190949639 is an apocalyptic number.

190949639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

190949639 is a deficient number, since it is larger than the sum of its proper divisors (10050001).

190949639 is a wasteful number, since it uses less digits than its factorization.

190949639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050000.

The product of its (nonzero) digits is 472392, while the sum is 50.

The square root of 190949639 is about 13818.4528439330. The cubic root of 190949639 is about 575.8459020245.

The spelling of 190949639 in words is "one hundred ninety million, nine hundred forty-nine thousand, six hundred thirty-nine".