99537217 has 24 divisors (see below), whose sum is σ = 113534568. Its totient is φ = 86688000.

The previous prime is 99537209. The next prime is 99537223. The reversal of 99537217 is 71273599.

It can be written as a sum of positive squares in 4 ways, for example, as 4260096 + 95277121 = 2064^2 + 9761^2 .

It is not a de Polignac number, because 99537217 - 2³ = 99537209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99537017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 985467 + ... + 985567.

It is an arithmetic number, because the mean of its divisors is an integer number (4730607).

Almost surely, 2^99537217 is an apocalyptic number.

It is an amenable number.

99537217 is a deficient number, since it is larger than the sum of its proper divisors (13997351).

99537217 is a wasteful number, since it uses less digits than its factorization.

99537217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 198 counting only the distinct ones).

The product of its digits is 119070, while the sum is 43.

The square root of 99537217 is about 9976.8340168613. The cubic root of 99537217 is about 463.4417598440.

The spelling of 99537217 in words is "ninety-nine million, five hundred thirty-seven thousand, two hundred seventeen".