139494917719 has 2 divisors, whose sum is σ = 139494917720. Its totient is φ = 139494917718.

The previous prime is 139494917663. The next prime is 139494917759. The reversal of 139494917719 is 917719494931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139494917719 - 2¹³ = 139494909527 is a prime.

It is a super-2 number, since 2×139494917719² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139494917759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69747458859 + 69747458860.

It is an arithmetic number, because the mean of its divisors is an integer number (69747458860).

Almost surely, 2^139494917719 is an apocalyptic number.

139494917719 is a deficient number, since it is larger than the sum of its proper divisors (1).

139494917719 is an equidigital number, since it uses as much as digits as its factorization.

139494917719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15431472, while the sum is 64.

The spelling of 139494917719 in words is "one hundred thirty-nine billion, four hundred ninety-four million, nine hundred seventeen thousand, seven hundred nineteen".