139777239 has 8 divisors (see below), whose sum is σ = 212993920. Its totient is φ = 79872696.

The previous prime is 139777237. The next prime is 139777273. The reversal of 139777239 is 932777931.

139777239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139777239 - 2¹ = 139777237 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 (139777237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3328009 + ... + 3328050.

It is an arithmetic number, because the mean of its divisors is an integer number (26624240).

Almost surely, 2^139777239 is an apocalyptic number.

139777239 is a deficient number, since it is larger than the sum of its proper divisors (73216681).

139777239 is an equidigital number, since it uses as much as digits as its factorization.

139777239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656069.

The product of its digits is 500094, while the sum is 48.

The square root of 139777239 is about 11822.7424483493. The cubic root of 139777239 is about 518.9738627546.

The spelling of 139777239 in words is "one hundred thirty-nine million, seven hundred seventy-seven thousand, two hundred thirty-nine".