99612257 has 2 divisors, whose sum is σ = 99612258. Its totient is φ = 99612256.

The previous prime is 99612239. The next prime is 99612259. The reversal of 99612257 is 75221699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78304801 + 21307456 = 8849^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 99612257 - 2¹⁰ = 99611233 is a prime.

Together with 99612259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99612259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49806128 + 49806129.

It is an arithmetic number, because the mean of its divisors is an integer number (49806129).

Almost surely, 2^99612257 is an apocalyptic number.

It is an amenable number.

99612257 is a deficient number, since it is larger than the sum of its proper divisors (1).

99612257 is an equidigital number, since it uses as much as digits as its factorization.

99612257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 99612257 is about 9980.5940203978. The cubic root of 99612257 is about 463.5581917848.

The spelling of 99612257 in words is "ninety-nine million, six hundred twelve thousand, two hundred fifty-seven".