139488659 has 4 divisors (see below), whose sum is σ = 141453360. Its totient is φ = 137523960.

The previous prime is 139488649. The next prime is 139488673. The reversal of 139488659 is 956884931.

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 139488659 - 2²⁰ = 138440083 is a prime.

It is a super-4 number, since 4×139488659⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139488659.

It is not an unprimeable number, because it can be changed into a prime (139488649) 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, 982244 + ... + 982385.

It is an arithmetic number, because the mean of its divisors is an integer number (35363340).

Almost surely, 2^139488659 is an apocalyptic number.

139488659 is a deficient number, since it is larger than the sum of its proper divisors (1964701).

139488659 is an equidigital number, since it uses as much as digits as its factorization.

139488659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964700.

The product of its digits is 1866240, while the sum is 53.

The square root of 139488659 is about 11810.5316984461. The cubic root of 139488659 is about 518.6164639299.

The spelling of 139488659 in words is "one hundred thirty-nine million, four hundred eighty-eight thousand, six hundred fifty-nine".