139069 has 4 divisors (see below), whose sum is σ = 158944. Its totient is φ = 119196.

The previous prime is 139067. The next prime is 139079. The reversal of 139069 is 960931.

It is a happy number.

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 not a de Polignac number, because 139069 - 2¹ = 139067 is a prime.

It is a super-2 number, since 2×139069² = 38680373522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9927 + ... + 9940.

It is an arithmetic number, because the mean of its divisors is an integer number (39736).

2¹³⁹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

139069 is a deficient number, since it is larger than the sum of its proper divisors (19875).

139069 is an equidigital number, since it uses as much as digits as its factorization.

139069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19874.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 139069 is about 372.9195623724. The cubic root of 139069 is about 51.8095846468.

The spelling of 139069 in words is "one hundred thirty-nine thousand, sixty-nine".