99727091 has 4 divisors (see below), whose sum is σ = 101848992. Its totient is φ = 97605192.

The previous prime is 99727087. The next prime is 99727141. The reversal of 99727091 is 19072799.

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 99727091 - 2² = 99727087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99721091) 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, 1060880 + ... + 1060973.

It is an arithmetic number, because the mean of its divisors is an integer number (25462248).

Almost surely, 2^99727091 is an apocalyptic number.

99727091 is a deficient number, since it is larger than the sum of its proper divisors (2121901).

99727091 is a wasteful number, since it uses less digits than its factorization.

99727091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121900.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 99727091 is about 9986.3452273592. The cubic root of 99727091 is about 463.7362548751.

The spelling of 99727091 in words is "ninety-nine million, seven hundred twenty-seven thousand, ninety-one".