139952823 has 16 divisors (see below), whose sum is σ = 197821440. Its totient is φ = 87706496.

The previous prime is 139952819. The next prime is 139952837. The reversal of 139952823 is 328259931.

139952823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139952823 - 2² = 139952819 is a prime.

It is a super-3 number, since 3×139952823³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139952863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72436 + ... + 74342.

It is an arithmetic number, because the mean of its divisors is an integer number (12363840).

Almost surely, 2^139952823 is an apocalyptic number.

139952823 is a deficient number, since it is larger than the sum of its proper divisors (57868617).

139952823 is a wasteful number, since it uses less digits than its factorization.

139952823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366.

The product of its digits is 116640, while the sum is 42.

The square root of 139952823 is about 11830.1658061077. The cubic root of 139952823 is about 519.1910783243.

The spelling of 139952823 in words is "one hundred thirty-nine million, nine hundred fifty-two thousand, eight hundred twenty-three".