139563805 has 8 divisors (see below), whose sum is σ = 173251800. Its totient is φ = 107800896.

The previous prime is 139563799. The next prime is 139563817. The reversal of 139563805 is 508365931.

It can be written as a sum of positive squares in 4 ways, for example, as 41434969 + 98128836 = 6437^2 + 9906^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139563805 - 2⁵ = 139563773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481110 + ... + 481399.

It is an arithmetic number, because the mean of its divisors is an integer number (21656475).

Almost surely, 2^139563805 is an apocalyptic number.

It is an amenable number.

139563805 is a deficient number, since it is larger than the sum of its proper divisors (33687995).

139563805 is an equidigital number, since it uses as much as digits as its factorization.

139563805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962543.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 139563805 is about 11813.7125832653. The cubic root of 139563805 is about 518.7095777280.

The spelling of 139563805 in words is "one hundred thirty-nine million, five hundred sixty-three thousand, eight hundred five".