99865047 has 16 divisors (see below), whose sum is σ = 134563968. Its totient is φ = 65875680.

The previous prime is 99865039. The next prime is 99865061. The reversal of 99865047 is 74056899.

It is not a de Polignac number, because 99865047 - 2³ = 99865039 is a prime.

It is a super-2 number, since 2×99865047² = 19946055224624418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99864987 and 99865005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99865147) 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, 216397 + ... + 216857.

It is an arithmetic number, because the mean of its divisors is an integer number (8410248).

Almost surely, 2^99865047 is an apocalyptic number.

99865047 is a deficient number, since it is larger than the sum of its proper divisors (34698921).

99865047 is a wasteful number, since it uses less digits than its factorization.

99865047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 99865047 is about 9993.2500719235. The cubic root of 99865047 is about 463.9499905848.

The spelling of 99865047 in words is "ninety-nine million, eight hundred sixty-five thousand, forty-seven".