99737221 has 2 divisors, whose sum is σ = 99737222. Its totient is φ = 99737220.

The previous prime is 99737207. The next prime is 99737333. The reversal of 99737221 is 12273799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 20349121 = 8910^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 99737221 - 2¹¹ = 99735173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99732221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49868610 + 49868611.

It is an arithmetic number, because the mean of its divisors is an integer number (49868611).

Almost surely, 2^99737221 is an apocalyptic number.

It is an amenable number.

99737221 is a deficient number, since it is larger than the sum of its proper divisors (1).

99737221 is an equidigital number, since it uses as much as digits as its factorization.

99737221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 99737221 is about 9986.8524070400. The cubic root of 99737221 is about 463.7519560223.

The spelling of 99737221 in words is "ninety-nine million, seven hundred thirty-seven thousand, two hundred twenty-one".