9900038587 has 4 divisors (see below), whose sum is σ = 10482393816. Its totient is φ = 9317683360.

The previous prime is 9900038567. The next prime is 9900038639. The reversal of 9900038587 is 7858300099.

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 9900038587 - 2³¹ = 7752554939 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 9900038587.

It is not an unprimeable number, because it can be changed into a prime (9900038567) 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, 291177589 + ... + 291177622.

It is an arithmetic number, because the mean of its divisors is an integer number (2620598454).

Almost surely, 2^9900038587 is an apocalyptic number.

9900038587 is a deficient number, since it is larger than the sum of its proper divisors (582355229).

9900038587 is a wasteful number, since it uses less digits than its factorization.

9900038587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582355228.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 9900038587 is about 99498.9376174439. The cubic root of 9900038587 is about 2147.2319587504.

The spelling of 9900038587 in words is "nine billion, nine hundred million, thirty-eight thousand, five hundred eighty-seven".