139617 has 8 divisors (see below), whose sum is σ = 206880. Its totient is φ = 93060.

The previous prime is 139609. The next prime is 139619. The reversal of 139617 is 716931.

It is not a de Polignac number, because 139617 - 2³ = 139609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5171 = 139617 / (1 + 3 + 9 + 6 + 1 + 7).

It is an Ulam number.

139617 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (139619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559 + ... + 2612.

It is an arithmetic number, because the mean of its divisors is an integer number (25860).

2¹³⁹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

139617 is a deficient number, since it is larger than the sum of its proper divisors (67263).

139617 is an equidigital number, since it uses as much as digits as its factorization.

139617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180 (or 5174 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 139617 is about 373.6535828813. The cubic root of 139617 is about 51.8775471726.

It can be divided in two parts, 1396 and 17, that multiplied together give a palindrome (23732).

The spelling of 139617 in words is "one hundred thirty-nine thousand, six hundred seventeen".