99723457 has 4 divisors (see below), whose sum is σ = 104972080. Its totient is φ = 94474836.

The previous prime is 99723443. The next prime is 99723529. The reversal of 99723457 is 75432799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99723457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99723427) 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, 2624283 + ... + 2624320.

It is an arithmetic number, because the mean of its divisors is an integer number (26243020).

Almost surely, 2^99723457 is an apocalyptic number.

It is an amenable number.

99723457 is a deficient number, since it is larger than the sum of its proper divisors (5248623).

99723457 is a wasteful number, since it uses less digits than its factorization.

99723457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5248622.

The product of its digits is 476280, while the sum is 46.

The square root of 99723457 is about 9986.1632772552. The cubic root of 99723457 is about 463.7306220425.

The spelling of 99723457 in words is "ninety-nine million, seven hundred twenty-three thousand, four hundred fifty-seven".