139469 has 8 divisors (see below), whose sum is σ = 157440. Its totient is φ = 122400.

The previous prime is 139459. The next prime is 139483. The reversal of 139469 is 964931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139469 is a prime.

It is a super-2 number, since 2×139469² = 38903203922, 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 (139409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 545.

It is an arithmetic number, because the mean of its divisors is an integer number (19680).

2¹³⁹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

139469 is a deficient number, since it is larger than the sum of its proper divisors (17971).

139469 is a wasteful number, since it uses less digits than its factorization.

139469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451.

The product of its digits is 5832, while the sum is 32.

The square root of 139469 is about 373.4554859685. The cubic root of 139469 is about 51.8592098843.

The spelling of 139469 in words is "one hundred thirty-nine thousand, four hundred sixty-nine".