139204099 has 4 divisors (see below), whose sum is σ = 140768280. Its totient is φ = 137639920.

The previous prime is 139204081. The next prime is 139204103. The reversal of 139204099 is 990402931.

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 139204099 - 2⁷ = 139203971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139204049) 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, 781957 + ... + 782134.

It is an arithmetic number, because the mean of its divisors is an integer number (35192070).

Almost surely, 2^139204099 is an apocalyptic number.

139204099 is a deficient number, since it is larger than the sum of its proper divisors (1564181).

139204099 is an equidigital number, since it uses as much as digits as its factorization.

139204099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564180.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 139204099 is about 11798.4786731171. The cubic root of 139204099 is about 518.2635607626.

The spelling of 139204099 in words is "one hundred thirty-nine million, two hundred four thousand, ninety-nine".