139783 has 8 divisors (see below), whose sum is σ = 168320. Its totient is φ = 113400.

The previous prime is 139759. The next prime is 139787. The reversal of 139783 is 387931.

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

It is not a de Polignac number, because 139783 - 2¹³ = 131591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139787) 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, 393 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (21040).

139783 is a Friedman number, since it can be written as 7+91*8^3*3, using all its digits and the basic arithmetic operations.

2¹³⁹⁷⁸³ is an apocalyptic number.

139783 is a deficient number, since it is larger than the sum of its proper divisors (28537).

139783 is a wasteful number, since it uses less digits than its factorization.

139783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077.

The product of its digits is 4536, while the sum is 31.

The square root of 139783 is about 373.8756477761. The cubic root of 139783 is about 51.8980992593.

The spelling of 139783 in words is "one hundred thirty-nine thousand, seven hundred eighty-three".