139390 has 16 divisors (see below), whose sum is σ = 256608. Its totient is φ = 54496.

The previous prime is 139387. The next prime is 139393. The reversal of 139390 is 93931.

It is an interprime number because it is at equal distance from previous prime (139387) and next prime (139393).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139393) 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, 399 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (16038).

2¹³⁹³⁹⁰ is an apocalyptic number.

139390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139390 is a deficient number, since it is larger than the sum of its proper divisors (117218).

139390 is a wasteful number, since it uses less digits than its factorization.

139390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 139390 is about 373.3497020221. The cubic root of 139390 is about 51.8494164263.

It can be divided in two parts, 139 and 390, that added together give a square (529 = 23²).

The spelling of 139390 in words is "one hundred thirty-nine thousand, three hundred ninety".