99857687 has 8 divisors (see below), whose sum is σ = 100876800. Its totient is φ = 98842464.

The previous prime is 99857683. The next prime is 99857689. The reversal of 99857687 is 78675899.

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 99857687 - 2² = 99857683 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 (99857683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89489 + ... + 90597.

It is an arithmetic number, because the mean of its divisors is an integer number (12609600).

Almost surely, 2^99857687 is an apocalyptic number.

99857687 is a deficient number, since it is larger than the sum of its proper divisors (1019113).

99857687 is a wasteful number, since it uses less digits than its factorization.

99857687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945.

The product of its digits is 7620480, while the sum is 59.

The square root of 99857687 is about 9992.8818165732. The cubic root of 99857687 is about 463.9385926836.

It can be divided in two parts, 998 and 57687, that added together give a palindrome (58685).

The spelling of 99857687 in words is "ninety-nine million, eight hundred fifty-seven thousand, six hundred eighty-seven".