99995957 has 2 divisors, whose sum is σ = 99995958. Its totient is φ = 99995956.

The previous prime is 99995939. The next prime is 99995983. The reversal of 99995957 is 75959999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63138916 + 36857041 = 7946^2 + 6071^2 .

It is an emirp because it is prime and its reverse (75959999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99995957 - 2⁶ = 99995893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99995957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99995257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997978 + 49997979.

It is an arithmetic number, because the mean of its divisors is an integer number (49997979).

Almost surely, 2^99995957 is an apocalyptic number.

It is an amenable number.

99995957 is a deficient number, since it is larger than the sum of its proper divisors (1).

99995957 is an equidigital number, since it uses as much as digits as its factorization.

99995957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10333575, while the sum is 62.

The square root of 99995957 is about 9999.7978479567. The cubic root of 99995957 is about 464.1526279624.

The spelling of 99995957 in words is "ninety-nine million, nine hundred ninety-five thousand, nine hundred fifty-seven".