139489 has 4 divisors (see below), whose sum is σ = 159424. Its totient is φ = 119556.

The previous prime is 139487. The next prime is 139493. The reversal of 139489 is 984931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139489 - 2¹ = 139487 is a prime.

It is a super-2 number, since 2×139489² = 38914362242, which contains 22 as substring.

It is a Duffinian number.

139489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (139483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9957 + ... + 9970.

It is an arithmetic number, because the mean of its divisors is an integer number (39856).

2¹³⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

139489 is a deficient number, since it is larger than the sum of its proper divisors (19935).

139489 is an equidigital number, since it uses as much as digits as its factorization.

139489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19934.

The product of its digits is 7776, while the sum is 34.

The square root of 139489 is about 373.4822619617. The cubic root of 139489 is about 51.8616886540.

The spelling of 139489 in words is "one hundred thirty-nine thousand, four hundred eighty-nine".