9955435987 has 6 divisors (see below), whose sum is σ = 11580813348. Its totient is φ = 8533230804.

The previous prime is 9955435957. The next prime is 9955436027. The reversal of 9955435987 is 7895345599.

It is not a de Polignac number, because 9955435987 - 2²⁷ = 9821218259 is a prime.

It is a super-2 number, since 2×9955435987² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9955435937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101586033 + ... + 101586130.

It is an arithmetic number, because the mean of its divisors is an integer number (1930135558).

Almost surely, 2^9955435987 is an apocalyptic number.

9955435987 is a deficient number, since it is larger than the sum of its proper divisors (1625377361).

9955435987 is a wasteful number, since it uses less digits than its factorization.

9955435987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203172177 (or 203172170 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 64.

The square root of 9955435987 is about 99776.9311364105. The cubic root of 9955435987 is about 2151.2295823733.

The spelling of 9955435987 in words is "nine billion, nine hundred fifty-five million, four hundred thirty-five thousand, nine hundred eighty-seven".