139088447 has 4 divisors (see below), whose sum is σ = 139476240. Its totient is φ = 138700656.

The previous prime is 139088431. The next prime is 139088461. The reversal of 139088447 is 744880931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139088447 - 2⁴ = 139088431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139088398 and 139088407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139088497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193358 + ... + 194075.

It is an arithmetic number, because the mean of its divisors is an integer number (34869060).

Almost surely, 2^139088447 is an apocalyptic number.

139088447 is a deficient number, since it is larger than the sum of its proper divisors (387793).

139088447 is an equidigital number, since it uses as much as digits as its factorization.

139088447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387792.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 139088447 is about 11793.5765143573. The cubic root of 139088447 is about 518.1199950092.

It can be divided in two parts, 1390884 and 47, that added together give a palindrome (1390931).

The spelling of 139088447 in words is "one hundred thirty-nine million, eighty-eight thousand, four hundred forty-seven".