139099 has 4 divisors (see below), whose sum is σ = 146440. Its totient is φ = 131760.

The previous prime is 139091. The next prime is 139109. The reversal of 139099 is 990931.

139099 = 41² + 42² + ... + 78².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990931 = 139 ⋅7129.

It is a cyclic number.

It is not a de Polignac number, because 139099 - 2³ = 139091 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 139099.

It is not an unprimeable number, because it can be changed into a prime (139091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3642 + ... + 3679.

It is an arithmetic number, because the mean of its divisors is an integer number (36610).

2¹³⁹⁰⁹⁹ is an apocalyptic number.

139099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139099 is a deficient number, since it is larger than the sum of its proper divisors (7341).

139099 is an equidigital number, since it uses as much as digits as its factorization.

139099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 139099 is about 372.9597833547. The cubic root of 139099 is about 51.8133098379.

The spelling of 139099 in words is "one hundred thirty-nine thousand, ninety-nine".