139179149 has 4 divisors (see below), whose sum is σ = 143978460. Its totient is φ = 134379840.

The previous prime is 139179097. The next prime is 139179151. The reversal of 139179149 is 941971931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941971931 = 661 ⋅1425071.

It can be written as a sum of positive squares in 2 ways, for example, as 39778249 + 99400900 = 6307^2 + 9970^2 .

It is a cyclic number.

It is not a de Polignac number, because 139179149 - 2¹² = 139175053 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 (139109149) 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, 2399612 + ... + 2399669.

It is an arithmetic number, because the mean of its divisors is an integer number (35994615).

Almost surely, 2^139179149 is an apocalyptic number.

It is an amenable number.

139179149 is a deficient number, since it is larger than the sum of its proper divisors (4799311).

139179149 is an equidigital number, since it uses as much as digits as its factorization.

139179149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799310.

The product of its digits is 61236, while the sum is 44.

The square root of 139179149 is about 11797.4212860269. The cubic root of 139179149 is about 518.2325955622.

The spelling of 139179149 in words is "one hundred thirty-nine million, one hundred seventy-nine thousand, one hundred forty-nine".