138098587 has 8 divisors (see below), whose sum is σ = 152062272. Its totient is φ = 124369800.

The previous prime is 138098579. The next prime is 138098659. The reversal of 138098587 is 785890831.

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 138098587 - 2³ = 138098579 is a prime.

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 138098587.

It is not an unprimeable number, because it can be changed into a prime (138098507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57489 + ... + 59842.

It is an arithmetic number, because the mean of its divisors is an integer number (19007784).

Almost surely, 2^138098587 is an apocalyptic number.

138098587 is a deficient number, since it is larger than the sum of its proper divisors (13963685).

138098587 is a wasteful number, since it uses less digits than its factorization.

138098587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117449.

The product of its (nonzero) digits is 483840, while the sum is 49.

The square root of 138098587 is about 11751.5355166889. The cubic root of 138098587 is about 516.8879546482.

The spelling of 138098587 in words is "one hundred thirty-eight million, ninety-eight thousand, five hundred eighty-seven".