99451 has 4 divisors (see below), whose sum is σ = 108504. Its totient is φ = 90400.

The previous prime is 99439. The next prime is 99469. The reversal of 99451 is 15499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15499 = 11 ⋅1409.

It is a cyclic number.

It is not a de Polignac number, because 99451 - 2⁹ = 98939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4510 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (27126).

2⁹⁹⁴⁵¹ is an apocalyptic number.

99451 is a deficient number, since it is larger than the sum of its proper divisors (9053).

99451 is a wasteful number, since it uses less digits than its factorization.

99451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052.

The product of its digits is 1620, while the sum is 28.

The square root of 99451 is about 315.3585261254. The cubic root of 99451 is about 46.3307913425.

The spelling of 99451 in words is "ninety-nine thousand, four hundred fifty-one".