139381514 has 4 divisors (see below), whose sum is σ = 209072274. Its totient is φ = 69690756.

The previous prime is 139381513. The next prime is 139381519. The reversal of 139381514 is 415183931.

139381514 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 415183931 = 71 ⋅5847661.

It can be written as a sum of positive squares in only one way, i.e., 138415225 + 966289 = 11765^2 + 983^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139381513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34845377 + ... + 34845380.

Almost surely, 2^139381514 is an apocalyptic number.

139381514 is a deficient number, since it is larger than the sum of its proper divisors (69690760).

139381514 is an equidigital number, since it uses as much as digits as its factorization.

139381514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69690759.

The product of its digits is 12960, while the sum is 35.

The square root of 139381514 is about 11805.9948331346. The cubic root of 139381514 is about 518.4836421530.

The spelling of 139381514 in words is "one hundred thirty-nine million, three hundred eighty-one thousand, five hundred fourteen".