139552393 has 4 divisors (see below), whose sum is σ = 139870720. Its totient is φ = 139234068.

The previous prime is 139552351. The next prime is 139552409. The reversal of 139552393 is 393255931.

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, and also an emirpimes, since its reverse is a distinct semiprime: 393255931 = 197 ⋅1996223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139552393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139552313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158505 + ... + 159382.

It is an arithmetic number, because the mean of its divisors is an integer number (34967680).

Almost surely, 2^139552393 is an apocalyptic number.

It is an amenable number.

139552393 is a deficient number, since it is larger than the sum of its proper divisors (318327).

139552393 is an equidigital number, since it uses as much as digits as its factorization.

139552393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318326.

The product of its digits is 109350, while the sum is 40.

The square root of 139552393 is about 11813.2295753532. The cubic root of 139552393 is about 518.6954392125.

The spelling of 139552393 in words is "one hundred thirty-nine million, five hundred fifty-two thousand, three hundred ninety-three".