99239057 has 2 divisors, whose sum is σ = 99239058. Its totient is φ = 99239056.

The previous prime is 99239053. The next prime is 99239059. The reversal of 99239057 is 75093299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56415121 + 42823936 = 7511^2 + 6544^2 .

It is an emirp because it is prime and its reverse (75093299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99239057 - 2² = 99239053 is a prime.

Together with 99239059, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99238999 and 99239017.

It is not a weakly prime, because it can be changed into another prime (99239053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49619528 + 49619529.

It is an arithmetic number, because the mean of its divisors is an integer number (49619529).

Almost surely, 2^99239057 is an apocalyptic number.

It is an amenable number.

99239057 is a deficient number, since it is larger than the sum of its proper divisors (1).

99239057 is an equidigital number, since it uses as much as digits as its factorization.

99239057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 99239057 is about 9961.8801940196. The cubic root of 99239057 is about 462.9785562298.

The spelling of 99239057 in words is "ninety-nine million, two hundred thirty-nine thousand, fifty-seven".