99475681 has 2 divisors, whose sum is σ = 99475682. Its totient is φ = 99475680.

The previous prime is 99475679. The next prime is 99475693. The reversal of 99475681 is 18657499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97693456 + 1782225 = 9884^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 99475681 - 2¹ = 99475679 is a prime.

It is a super-2 number, since 2×99475681² = 19790822220827522, which contains 22 as substring.

Together with 99475679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99475631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49737840 + 49737841.

It is an arithmetic number, because the mean of its divisors is an integer number (49737841).

Almost surely, 2^99475681 is an apocalyptic number.

It is an amenable number.

99475681 is a deficient number, since it is larger than the sum of its proper divisors (1).

99475681 is an equidigital number, since it uses as much as digits as its factorization.

99475681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 99475681 is about 9973.7495958140. The cubic root of 99475681 is about 463.3462370104.

Adding to 99475681 its product of digits (544320), we get a palindrome (100020001).

The spelling of 99475681 in words is "ninety-nine million, four hundred seventy-five thousand, six hundred eighty-one".