99543957 has 4 divisors (see below), whose sum is σ = 132725280. Its totient is φ = 66362636.

The previous prime is 99543953. The next prime is 99543967. The reversal of 99543957 is 75934599.

It is a happy number.

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 not a de Polignac number, because 99543957 - 2² = 99543953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99543953) 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, 16590657 + ... + 16590662.

It is an arithmetic number, because the mean of its divisors is an integer number (33181320).

Almost surely, 2^99543957 is an apocalyptic number.

It is an amenable number.

99543957 is a deficient number, since it is larger than the sum of its proper divisors (33181323).

99543957 is a wasteful number, since it uses less digits than its factorization.

99543957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33181322.

The product of its digits is 1530900, while the sum is 51.

The square root of 99543957 is about 9977.1717936497. The cubic root of 99543957 is about 463.4522200084.

The spelling of 99543957 in words is "ninety-nine million, five hundred forty-three thousand, nine hundred fifty-seven".