99813451 has 4 divisors (see below), whose sum is σ = 101303272. Its totient is φ = 98323632.

The previous prime is 99813421. The next prime is 99813463. The reversal of 99813451 is 15431899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15431899 = 7 ⋅2204557.

It is a cyclic number.

It is not a de Polignac number, because 99813451 - 2⁷ = 99813323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99813401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744810 + ... + 744943.

It is an arithmetic number, because the mean of its divisors is an integer number (25325818).

Almost surely, 2^99813451 is an apocalyptic number.

99813451 is a deficient number, since it is larger than the sum of its proper divisors (1489821).

99813451 is a wasteful number, since it uses less digits than its factorization.

99813451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489820.

The product of its digits is 38880, while the sum is 40.

The square root of 99813451 is about 9990.6681958716. The cubic root of 99813451 is about 463.8700757791.

The spelling of 99813451 in words is "ninety-nine million, eight hundred thirteen thousand, four hundred fifty-one".