99234721 has 2 divisors, whose sum is σ = 99234722. Its totient is φ = 99234720.

The previous prime is 99234691. The next prime is 99234743. The reversal of 99234721 is 12743299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92929600 + 6305121 = 9640^2 + 2511^2 .

It is a cyclic number.

It is not a de Polignac number, because 99234721 - 2⁹ = 99234209 is a prime.

It is not a weakly prime, because it can be changed into another prime (99234761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49617360 + 49617361.

It is an arithmetic number, because the mean of its divisors is an integer number (49617361).

Almost surely, 2^99234721 is an apocalyptic number.

It is an amenable number.

99234721 is a deficient number, since it is larger than the sum of its proper divisors (1).

99234721 is an equidigital number, since it uses as much as digits as its factorization.

99234721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 99234721 is about 9961.6625620425. The cubic root of 99234721 is about 462.9718132387.

The spelling of 99234721 in words is "ninety-nine million, two hundred thirty-four thousand, seven hundred twenty-one".