99003721 has 2 divisors, whose sum is σ = 99003722. Its totient is φ = 99003720.

The previous prime is 99003713. The next prime is 99003731. The reversal of 99003721 is 12730099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97713225 + 1290496 = 9885^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 99003721 - 2³ = 99003713 is a prime.

It is not a weakly prime, because it can be changed into another prime (99003701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49501860 + 49501861.

It is an arithmetic number, because the mean of its divisors is an integer number (49501861).

Almost surely, 2^99003721 is an apocalyptic number.

It is an amenable number.

99003721 is a deficient number, since it is larger than the sum of its proper divisors (1).

99003721 is an equidigital number, since it uses as much as digits as its factorization.

99003721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 99003721 is about 9950.0613565947. The cubic root of 99003721 is about 462.6122966665.

The spelling of 99003721 in words is "ninety-nine million, three thousand, seven hundred twenty-one".