9900247 has 4 divisors (see below), whose sum is σ = 11314576. Its totient is φ = 8485920.

The previous prime is 9900203. The next prime is 9900251. The reversal of 9900247 is 7420099.

9900247 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7420099 = 23 ⋅322613.

It is a cyclic number.

It is not a de Polignac number, because 9900247 - 2⁷ = 9900119 is a prime.

It is a super-2 number, since 2×9900247² = 196029781322018, which contains 22 as substring.

9900247 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9900287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707154 + ... + 707167.

It is an arithmetic number, because the mean of its divisors is an integer number (2828644).

Almost surely, 2^9900247 is an apocalyptic number.

9900247 is a deficient number, since it is larger than the sum of its proper divisors (1414329).

9900247 is a wasteful number, since it uses less digits than its factorization.

9900247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414328.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 9900247 is about 3146.4657951422. The cubic root of 9900247 is about 214.7247026298.

The spelling of 9900247 in words is "nine million, nine hundred thousand, two hundred forty-seven".