139057418 has 4 divisors (see below), whose sum is σ = 208586130. Its totient is φ = 69528708.

The previous prime is 139057411. The next prime is 139057441. The reversal of 139057418 is 814750931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 814750931 = 271 ⋅3006461.

It can be written as a sum of positive squares in only one way, i.e., 84400969 + 54656449 = 9187^2 + 7393^2 .

It is not an unprimeable number, because it can be changed into a prime (139057411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34764353 + ... + 34764356.

Almost surely, 2^139057418 is an apocalyptic number.

139057418 is a deficient number, since it is larger than the sum of its proper divisors (69528712).

139057418 is an equidigital number, since it uses as much as digits as its factorization.

139057418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69528711.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 139057418 is about 11792.2609367330. The cubic root of 139057418 is about 518.0814633139.

The spelling of 139057418 in words is "one hundred thirty-nine million, fifty-seven thousand, four hundred eighteen".