99397 has 2 divisors, whose sum is σ = 99398. Its totient is φ = 99396.
The previous prime is 99391. The next prime is 99401. The reversal of 99397 is 79399.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 83521 + 15876 = 289^2 + 126^2 .
99397 is a truncatable prime.
It is an emirp because it is prime and its reverse (79399) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 99397 - 215 = 66629 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (99391) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49698 + 49699.
It is an arithmetic number, because the mean of its divisors is an integer number (49699).
299397 is an apocalyptic number.
It is an amenable number.
99397 is a deficient number, since it is larger than the sum of its proper divisors (1).
99397 is an equidigital number, since it uses as much as digits as its factorization.
99397 is an evil number, because the sum of its binary digits is even.
The product of its digits is 15309, while the sum is 37.
The square root of 99397 is about 315.2728976617. The cubic root of 99397 is about 46.3224042450.
It can be divided in two parts, 99 and 397, that added together give a triangular number (496 = T31).
The spelling of 99397 in words is "ninety-nine thousand, three hundred ninety-seven".
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