139047779 has 16 divisors (see below), whose sum is σ = 157852800. Its totient is φ = 121570176.

The previous prime is 139047773. The next prime is 139047781. The reversal of 139047779 is 977740931.

It is not a de Polignac number, because 139047779 - 2¹² = 139043683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139047773) 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 15 ways as a sum of consecutive naturals, for example, 16502 + ... + 23460.

It is an arithmetic number, because the mean of its divisors is an integer number (9865800).

Almost surely, 2^139047779 is an apocalyptic number.

139047779 is a deficient number, since it is larger than the sum of its proper divisors (18805021).

139047779 is a wasteful number, since it uses less digits than its factorization.

139047779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 139047779 is about 11791.8522293998. The cubic root of 139047779 is about 518.0694924731.

The spelling of 139047779 in words is "one hundred thirty-nine million, forty-seven thousand, seven hundred seventy-nine".