139655457 has 12 divisors (see below), whose sum is σ = 203511204. Its totient is φ = 92279040.

The previous prime is 139655449. The next prime is 139655473. The reversal of 139655457 is 754556931.

139655457 is a `hidden beast` number, since 1 + 3 + 96 + 554 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54997056 + 84658401 = 7416^2 + 9201^2 .

It is not a de Polignac number, because 139655457 - 2³ = 139655449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139655557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67644 + ... + 69677.

It is an arithmetic number, because the mean of its divisors is an integer number (16959267).

Almost surely, 2^139655457 is an apocalyptic number.

It is an amenable number.

139655457 is a deficient number, since it is larger than the sum of its proper divisors (63855747).

139655457 is a wasteful number, since it uses less digits than its factorization.

139655457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137440 (or 137437 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 139655457 is about 11817.5909981688. The cubic root of 139655457 is about 518.8230989649.

The spelling of 139655457 in words is "one hundred thirty-nine million, six hundred fifty-five thousand, four hundred fifty-seven".