139321593 has 16 divisors (see below), whose sum is σ = 206660160. Its totient is φ = 92765088.

The previous prime is 139321561. The next prime is 139321601. The reversal of 139321593 is 395123931.

139321593 is a `hidden beast` number, since 1 + 39 + 32 + 1 + 593 = 666.

139321593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139321593 - 2⁵ = 139321561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139321543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22546 + ... + 28052.

It is an arithmetic number, because the mean of its divisors is an integer number (12916260).

Almost surely, 2^139321593 is an apocalyptic number.

It is an amenable number.

139321593 is a deficient number, since it is larger than the sum of its proper divisors (67338567).

139321593 is an equidigital number, since it uses as much as digits as its factorization.

139321593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453 (or 6447 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 139321593 is about 11803.4568241681. The cubic root of 139321593 is about 518.4093316972.

The spelling of 139321593 in words is "one hundred thirty-nine million, three hundred twenty-one thousand, five hundred ninety-three".