99997451 has 4 divisors (see below), whose sum is σ = 105879672. Its totient is φ = 94115232.

The previous prime is 99997441. The next prime is 99997459. The reversal of 99997451 is 15479999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15479999 = 3511 ⋅4409.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99997451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99997393 and 99997402.

It is not an unprimeable number, because it can be changed into a prime (99997459) 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 3 ways as a sum of consecutive naturals, for example, 2941085 + ... + 2941118.

It is an arithmetic number, because the mean of its divisors is an integer number (26469918).

Almost surely, 2^99997451 is an apocalyptic number.

99997451 is a deficient number, since it is larger than the sum of its proper divisors (5882221).

99997451 is a wasteful number, since it uses less digits than its factorization.

99997451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882220.

The product of its digits is 918540, while the sum is 53.

The square root of 99997451 is about 9999.8725491878. The cubic root of 99997451 is about 464.1549395245.

The spelling of 99997451 in words is "ninety-nine million, nine hundred ninety-seven thousand, four hundred fifty-one".