99478023 has 4 divisors (see below), whose sum is σ = 132637368. Its totient is φ = 66318680.

The previous prime is 99478021. The next prime is 99478037. The reversal of 99478023 is 32087499.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99478023 - 2¹ = 99478021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99478021) 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, 16579668 + ... + 16579673.

It is an arithmetic number, because the mean of its divisors is an integer number (33159342).

Almost surely, 2^99478023 is an apocalyptic number.

99478023 is a deficient number, since it is larger than the sum of its proper divisors (33159345).

99478023 is a wasteful number, since it uses less digits than its factorization.

99478023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33159344.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 99478023 is about 9973.8670033242. The cubic root of 99478023 is about 463.3498732371.

The spelling of 99478023 in words is "ninety-nine million, four hundred seventy-eight thousand, twenty-three".