99951569 has 2 divisors, whose sum is σ = 99951570. Its totient is φ = 99951568.

The previous prime is 99951557. The next prime is 99951601. The reversal of 99951569 is 96515999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84640000 + 15311569 = 9200^2 + 3913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99951569 is a prime.

It is a super-2 number, since 2×99951569² = 19980632291123522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99951569.

It is not a weakly prime, because it can be changed into another prime (99951529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49975784 + 49975785.

It is an arithmetic number, because the mean of its divisors is an integer number (49975785).

Almost surely, 2^99951569 is an apocalyptic number.

It is an amenable number.

99951569 is a deficient number, since it is larger than the sum of its proper divisors (1).

99951569 is an equidigital number, since it uses as much as digits as its factorization.

99951569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 984150, while the sum is 53.

The square root of 99951569 is about 9997.5781567338. The cubic root of 99951569 is about 464.0839389983.

The spelling of 99951569 in words is "ninety-nine million, nine hundred fifty-one thousand, five hundred sixty-nine".