99405493 has 12 divisors (see below), whose sum is σ = 110280940. Its totient is φ = 89527680.

The previous prime is 99405479. The next prime is 99405521. The reversal of 99405493 is 39450499.

It can be written as a sum of positive squares in 2 ways, for example, as 56280004 + 43125489 = 7502^2 + 6567^2 .

It is not a de Polignac number, because 99405493 - 2¹⁷ = 99274421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99405413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9421 + ... + 16957.

Almost surely, 2^99405493 is an apocalyptic number.

It is an amenable number.

99405493 is a deficient number, since it is larger than the sum of its proper divisors (10875447).

99405493 is a wasteful number, since it uses less digits than its factorization.

99405493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668 (or 7657 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 99405493 is about 9970.2303383623. The cubic root of 99405493 is about 463.2372355032.

The spelling of 99405493 in words is "ninety-nine million, four hundred five thousand, four hundred ninety-three".