139777841 has 6 divisors (see below), whose sum is σ = 162598770. Its totient is φ = 119809536.

The previous prime is 139777837. The next prime is 139777843. The reversal of 139777841 is 148777931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 92236816 + 47541025 = 9604^2 + 6895^2 .

It is not a de Polignac number, because 139777841 - 2² = 139777837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139777843) 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 5 ways as a sum of consecutive naturals, for example, 1426256 + ... + 1426353.

It is an arithmetic number, because the mean of its divisors is an integer number (27099795).

Almost surely, 2^139777841 is an apocalyptic number.

It is an amenable number.

139777841 is a deficient number, since it is larger than the sum of its proper divisors (22820929).

139777841 is an equidigital number, since it uses as much as digits as its factorization.

139777841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852623 (or 2852616 counting only the distinct ones).

The product of its digits is 296352, while the sum is 47.

The square root of 139777841 is about 11822.7679077279. The cubic root of 139777841 is about 518.9746078016.

The spelling of 139777841 in words is "one hundred thirty-nine million, seven hundred seventy-seven thousand, eight hundred forty-one".