985642099 has 16 divisors (see below), whose sum is σ = 1124964288. Its totient is φ = 855493632.

The previous prime is 985642067. The next prime is 985642121. The reversal of 985642099 is 990246589.

It is a cyclic number.

It is not a de Polignac number, because 985642099 - 2⁵ = 985642067 is a prime.

It is a super-2 number, since 2×985642099² = 1942980694642251602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985642019) 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, 460159 + ... + 462295.

It is an arithmetic number, because the mean of its divisors is an integer number (70310268).

Almost surely, 2^985642099 is an apocalyptic number.

985642099 is a deficient number, since it is larger than the sum of its proper divisors (139322189).

985642099 is a wasteful number, since it uses less digits than its factorization.

985642099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 985642099 is about 31394.9374740578. The cubic root of 985642099 is about 995.1909430443.

The spelling of 985642099 in words is "nine hundred eighty-five million, six hundred forty-two thousand, ninety-nine".