139385377 has 2 divisors, whose sum is σ = 139385378. Its totient is φ = 139385376.

The previous prime is 139385357. The next prime is 139385383. The reversal of 139385377 is 773583931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105698961 + 33686416 = 10281^2 + 5804^2 .

It is an emirp because it is prime and its reverse (773583931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139385377 - 2⁷ = 139385249 is a prime.

It is not a weakly prime, because it can be changed into another prime (139385347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69692688 + 69692689.

It is an arithmetic number, because the mean of its divisors is an integer number (69692689).

Almost surely, 2^139385377 is an apocalyptic number.

It is an amenable number.

139385377 is a deficient number, since it is larger than the sum of its proper divisors (1).

139385377 is an equidigital number, since it uses as much as digits as its factorization.

139385377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The square root of 139385377 is about 11806.1584353252. The cubic root of 139385377 is about 518.4884320847.

The spelling of 139385377 in words is "one hundred thirty-nine million, three hundred eighty-five thousand, three hundred seventy-seven".