139200487 has 4 divisors (see below), whose sum is σ = 139501600. Its totient is φ = 138899376.

The previous prime is 139200463. The next prime is 139200499. The reversal of 139200487 is 784002931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139200487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139200587) 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, 149862 + ... + 150787.

It is an arithmetic number, because the mean of its divisors is an integer number (34875400).

Almost surely, 2^139200487 is an apocalyptic number.

139200487 is a deficient number, since it is larger than the sum of its proper divisors (301113).

139200487 is an equidigital number, since it uses as much as digits as its factorization.

139200487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301112.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 139200487 is about 11798.3256015419. The cubic root of 139200487 is about 518.2590781739.

The spelling of 139200487 in words is "one hundred thirty-nine million, two hundred thousand, four hundred eighty-seven".