99989105138 has 64 divisors (see below), whose sum is σ = 165729830112. Its totient is φ = 44962836480.

The previous prime is 99989105129. The next prime is 99989105147. The reversal of 99989105138 is 83150198999.

It is an interprime number because it is at equal distance from previous prime (99989105129) and next prime (99989105147).

It can be written as a sum of positive squares in 16 ways, for example, as 16743583609 + 83245521529 = 129397^2 + 288523^2 .

It is a super-2 number, since 2×99989105138² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102342506 + ... + 102343482.

Almost surely, 2^99989105138 is an apocalyptic number.

99989105138 is a deficient number, since it is larger than the sum of its proper divisors (65740724974).

99989105138 is a wasteful number, since it uses less digits than its factorization.

99989105138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 6298560, while the sum is 62.

The spelling of 99989105138 in words is "ninety-nine billion, nine hundred eighty-nine million, one hundred five thousand, one hundred thirty-eight".