99859949 has 16 divisors (see below), whose sum is σ = 116688000. Its totient is φ = 83692224.

The previous prime is 99859939. The next prime is 99859961. The reversal of 99859949 is 94995899.

It is not a de Polignac number, because 99859949 - 2¹² = 99855853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 99859891 and 99859900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99859909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69167 + ... + 70595.

It is an arithmetic number, because the mean of its divisors is an integer number (7293000).

Almost surely, 2^99859949 is an apocalyptic number.

It is an amenable number.

99859949 is a deficient number, since it is larger than the sum of its proper divisors (16828051).

99859949 is a wasteful number, since it uses less digits than its factorization.

99859949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652.

The product of its digits is 9447840, while the sum is 62.

The square root of 99859949 is about 9992.9949964963. The cubic root of 99859949 is about 463.9420957394.

The spelling of 99859949 in words is "ninety-nine million, eight hundred fifty-nine thousand, nine hundred forty-nine".