99540637 has 8 divisors (see below), whose sum is σ = 114107072. Its totient is φ = 85060800.

The previous prime is 99540613. The next prime is 99540643. The reversal of 99540637 is 73604599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99540637 - 2¹⁵ = 99507869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99540593 and 99540602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99540607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19164 + ... + 23797.

It is an arithmetic number, because the mean of its divisors is an integer number (14263384).

Almost surely, 2^99540637 is an apocalyptic number.

It is an amenable number.

99540637 is a deficient number, since it is larger than the sum of its proper divisors (14566435).

99540637 is a wasteful number, since it uses less digits than its factorization.

99540637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43299.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 99540637 is about 9977.0054124472. The cubic root of 99540637 is about 463.4470675829.

The spelling of 99540637 in words is "ninety-nine million, five hundred forty thousand, six hundred thirty-seven".