99444491 has 2 divisors, whose sum is σ = 99444492. Its totient is φ = 99444490.

The previous prime is 99444487. The next prime is 99444539. The reversal of 99444491 is 19444499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99444491 - 2² = 99444487 is a prime.

It is not a weakly prime, because it can be changed into another prime (99444431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49722245 + 49722246.

It is an arithmetic number, because the mean of its divisors is an integer number (49722246).

Almost surely, 2^99444491 is an apocalyptic number.

99444491 is a deficient number, since it is larger than the sum of its proper divisors (1).

99444491 is an equidigital number, since it uses as much as digits as its factorization.

99444491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 99444491 is about 9972.1858687050. The cubic root of 99444491 is about 463.2978054753.

The spelling of 99444491 in words is "ninety-nine million, four hundred forty-four thousand, four hundred ninety-one".