139936823 has 4 divisors (see below), whose sum is σ = 150701208. Its totient is φ = 129172440.

The previous prime is 139936817. The next prime is 139936829. The reversal of 139936823 is 328639931.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (139936817) and next prime (139936829).

It is a cyclic number.

It is not a de Polignac number, because 139936823 - 2¹⁴ = 139920439 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 (139936829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5382173 + ... + 5382198.

It is an arithmetic number, because the mean of its divisors is an integer number (37675302).

Almost surely, 2^139936823 is an apocalyptic number.

139936823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

139936823 is a deficient number, since it is larger than the sum of its proper divisors (10764385).

139936823 is a wasteful number, since it uses less digits than its factorization.

139936823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10764384.

The product of its digits is 209952, while the sum is 44.

The square root of 139936823 is about 11829.4895494269. The cubic root of 139936823 is about 519.1712921952.

The spelling of 139936823 in words is "one hundred thirty-nine million, nine hundred thirty-six thousand, eight hundred twenty-three".