139623 has 8 divisors (see below), whose sum is σ = 203136. Its totient is φ = 84600.

The previous prime is 139619. The next prime is 139627. The reversal of 139623 is 326931.

It is an interprime number because it is at equal distance from previous prime (139619) and next prime (139627).

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

It is not a de Polignac number, because 139623 - 2² = 139619 is a prime.

139623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 139593 and 139602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139627) 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, 2083 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (25392).

2¹³⁹⁶²³ is an apocalyptic number.

139623 is a deficient number, since it is larger than the sum of its proper divisors (63513).

139623 is a wasteful number, since it uses less digits than its factorization.

139623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4245.

The product of its digits is 972, while the sum is 24.

The square root of 139623 is about 373.6616116221. The cubic root of 139623 is about 51.8782903027.

The spelling of 139623 in words is "one hundred thirty-nine thousand, six hundred twenty-three".