99400491 has 6 divisors (see below), whose sum is σ = 143578500. Its totient is φ = 66266988.

The previous prime is 99400489. The next prime is 99400501. The reversal of 99400491 is 19400499.

It is not a de Polignac number, because 99400491 - 2¹ = 99400489 is a prime.

It is a super-2 number, since 2×99400491² = 19760915222082162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99400421) 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 5 ways as a sum of consecutive naturals, for example, 5522241 + ... + 5522258.

It is an arithmetic number, because the mean of its divisors is an integer number (23929750).

Almost surely, 2^99400491 is an apocalyptic number.

99400491 is a deficient number, since it is larger than the sum of its proper divisors (44178009).

99400491 is a wasteful number, since it uses less digits than its factorization.

99400491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044505 (or 11044502 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 99400491 is about 9969.9794884443. The cubic root of 99400491 is about 463.2294654715.

The spelling of 99400491 in words is "ninety-nine million, four hundred thousand, four hundred ninety-one".