99785247 has 16 divisors (see below), whose sum is σ = 139097088. Its totient is φ = 63509600.

The previous prime is 99785227. The next prime is 99785251. The reversal of 99785247 is 74258799.

It is a cyclic number.

It is not a de Polignac number, because 99785247 - 2⁸ = 99784991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99785247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99785227) 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, 47338 + ... + 49400.

It is an arithmetic number, because the mean of its divisors is an integer number (8693568).

Almost surely, 2^99785247 is an apocalyptic number.

99785247 is a deficient number, since it is larger than the sum of its proper divisors (39311841).

99785247 is a wasteful number, since it uses less digits than its factorization.

99785247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790.

The product of its digits is 1270080, while the sum is 51.

The square root of 99785247 is about 9989.2565789452. The cubic root of 99785247 is about 463.8263801851.

It can be divided in two parts, 9978 and 5247, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 99785247 in words is "ninety-nine million, seven hundred eighty-five thousand, two hundred forty-seven".