139019293 has 4 divisors (see below), whose sum is σ = 158879200. Its totient is φ = 119159388.

The previous prime is 139019269. The next prime is 139019297. The reversal of 139019293 is 392910931.

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 139019293 - 2²¹ = 136922141 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 (139019297) 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, 9929943 + ... + 9929956.

It is an arithmetic number, because the mean of its divisors is an integer number (39719800).

Almost surely, 2^139019293 is an apocalyptic number.

It is an amenable number.

139019293 is a deficient number, since it is larger than the sum of its proper divisors (19859907).

139019293 is an equidigital number, since it uses as much as digits as its factorization.

139019293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19859906.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 139019293 is about 11790.6442996131. The cubic root of 139019293 is about 518.0341119836.

The spelling of 139019293 in words is "one hundred thirty-nine million, nineteen thousand, two hundred ninety-three".