99271647 has 18 divisors (see below), whose sum is σ = 144814488. Its totient is φ = 65528832.

The previous prime is 99271639. The next prime is 99271651. The reversal of 99271647 is 74617299.

It is not a de Polignac number, because 99271647 - 2³ = 99271639 is a prime.

It is a super-4 number, since 4×99271647⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99271607) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 386143 + ... + 386399.

Almost surely, 2^99271647 is an apocalyptic number.

99271647 is a deficient number, since it is larger than the sum of its proper divisors (45542841).

99271647 is a wasteful number, since it uses less digits than its factorization.

99271647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 427 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 99271647 is about 9963.5157951398. The cubic root of 99271647 is about 463.0292312370.

The spelling of 99271647 in words is "ninety-nine million, two hundred seventy-one thousand, six hundred forty-seven".