99637399 has 2 divisors, whose sum is σ = 99637400. Its totient is φ = 99637398.

The previous prime is 99637397. The next prime is 99637429. The reversal of 99637399 is 99373699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99637399 - 2¹ = 99637397 is a prime.

It is a super-2 number, since 2×99637399² = 19855222558970402, which contains 22 as substring.

Together with 99637397, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99637393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49818699 + 49818700.

It is an arithmetic number, because the mean of its divisors is an integer number (49818700).

Almost surely, 2^99637399 is an apocalyptic number.

99637399 is a deficient number, since it is larger than the sum of its proper divisors (1).

99637399 is an equidigital number, since it uses as much as digits as its factorization.

99637399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2480058, while the sum is 55.

The square root of 99637399 is about 9981.8534852000. The cubic root of 99637399 is about 463.5971889926.

The spelling of 99637399 in words is "ninety-nine million, six hundred thirty-seven thousand, three hundred ninety-nine".