139038587 has 4 divisors (see below), whose sum is σ = 139105320. Its totient is φ = 138971856.

The previous prime is 139038583. The next prime is 139038607. The reversal of 139038587 is 785830931.

It is a happy number.

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 139038587 - 2² = 139038583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139038583) 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, 30137 + ... + 34442.

It is an arithmetic number, because the mean of its divisors is an integer number (34776330).

Almost surely, 2^139038587 is an apocalyptic number.

139038587 is a deficient number, since it is larger than the sum of its proper divisors (66733).

139038587 is an equidigital number, since it uses as much as digits as its factorization.

139038587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66732.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 139038587 is about 11791.4624623072. The cubic root of 139038587 is about 518.0580762541.

The spelling of 139038587 in words is "one hundred thirty-nine million, thirty-eight thousand, five hundred eighty-seven".