139793854 has 4 divisors (see below), whose sum is σ = 209690784. Its totient is φ = 69896926.

The previous prime is 139793831. The next prime is 139793879. The reversal of 139793854 is 458397931.

139793854 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: 458397931 = 43 ⋅10660417.

It is a junction number, because it is equal to n+sod(n) for n = 139793798 and 139793807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34948462 + ... + 34948465.

It is an arithmetic number, because the mean of its divisors is an integer number (52422696).

Almost surely, 2^139793854 is an apocalyptic number.

139793854 is a deficient number, since it is larger than the sum of its proper divisors (69896930).

139793854 is an equidigital number, since it uses as much as digits as its factorization.

139793854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69896929.

The product of its digits is 816480, while the sum is 49.

The square root of 139793854 is about 11823.4450986166. The cubic root of 139793854 is about 518.9944250177.

The spelling of 139793854 in words is "one hundred thirty-nine million, seven hundred ninety-three thousand, eight hundred fifty-four".