139250923 has 4 divisors (see below), whose sum is σ = 159143920. Its totient is φ = 119357928.

The previous prime is 139250863. The next prime is 139250929. The reversal of 139250923 is 329052931.

139250923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329052931 = 17191 ⋅19141.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139250923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139250929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9946488 + ... + 9946501.

It is an arithmetic number, because the mean of its divisors is an integer number (39785980).

Almost surely, 2^139250923 is an apocalyptic number.

139250923 is a deficient number, since it is larger than the sum of its proper divisors (19892997).

139250923 is an equidigital number, since it uses as much as digits as its factorization.

139250923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19892996.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 139250923 is about 11800.4628299063. The cubic root of 139250923 is about 518.3216635837.

The spelling of 139250923 in words is "one hundred thirty-nine million, two hundred fifty thousand, nine hundred twenty-three".