139356441 has 30 divisors (see below), whose sum is σ = 234863850. Its totient is φ = 79619904.

The previous prime is 139356433. The next prime is 139356461. The reversal of 139356441 is 144653931.

139356441 is a `hidden beast` number, since 1 + 3 + 9 + 3 + 5 + 644 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 1058841 = 11760^2 + 1029^2 .

It is not a de Polignac number, because 139356441 - 2³ = 139356433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139356396 and 139356405.

It is not an unprimeable number, because it can be changed into a prime (139356401) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 18385 + ... + 24833.

It is an arithmetic number, because the mean of its divisors is an integer number (7828795).

Almost surely, 2^139356441 is an apocalyptic number.

It is an amenable number.

139356441 is a deficient number, since it is larger than the sum of its proper divisors (95507409).

139356441 is an frugal number, since it uses more digits than its factorization.

139356441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483 (or 6459 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 139356441 is about 11804.9329095933. The cubic root of 139356441 is about 518.4525507034.

The spelling of 139356441 in words is "one hundred thirty-nine million, three hundred fifty-six thousand, four hundred forty-one".