139268393 has 4 divisors (see below), whose sum is σ = 151929168. Its totient is φ = 126607620.

The previous prime is 139268329. The next prime is 139268413. The reversal of 139268393 is 393862931.

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 139268393 - 2⁶ = 139268329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139268303) 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, 6330371 + ... + 6330392.

It is an arithmetic number, because the mean of its divisors is an integer number (37982292).

Almost surely, 2^139268393 is an apocalyptic number.

It is an amenable number.

139268393 is a deficient number, since it is larger than the sum of its proper divisors (12660775).

139268393 is a wasteful number, since it uses less digits than its factorization.

139268393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12660774.

The product of its digits is 209952, while the sum is 44.

The square root of 139268393 is about 11801.2030318947. The cubic root of 139268393 is about 518.3433383672.

The spelling of 139268393 in words is "one hundred thirty-nine million, two hundred sixty-eight thousand, three hundred ninety-three".