139140893 has 4 divisors (see below), whose sum is σ = 139974240. Its totient is φ = 138307548.

The previous prime is 139140889. The next prime is 139140907. The reversal of 139140893 is 398041931.

It is a happy number.

139140893 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139140893 - 2² = 139140889 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 (139140853) 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, 416423 + ... + 416756.

It is an arithmetic number, because the mean of its divisors is an integer number (34993560).

Almost surely, 2^139140893 is an apocalyptic number.

It is an amenable number.

139140893 is a deficient number, since it is larger than the sum of its proper divisors (833347).

139140893 is an equidigital number, since it uses as much as digits as its factorization.

139140893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833346.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 139140893 is about 11795.7998033198. The cubic root of 139140893 is about 518.1851092276.

The spelling of 139140893 in words is "one hundred thirty-nine million, one hundred forty thousand, eight hundred ninety-three".