99623653 has 2 divisors, whose sum is σ = 99623654. Its totient is φ = 99623652.

The previous prime is 99623651. The next prime is 99623659. The reversal of 99623653 is 35632699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59706529 + 39917124 = 7727^2 + 6318^2 .

It is a cyclic number.

It is not a de Polignac number, because 99623653 - 2¹ = 99623651 is a prime.

Together with 99623651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99623651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49811826 + 49811827.

It is an arithmetic number, because the mean of its divisors is an integer number (49811827).

Almost surely, 2^99623653 is an apocalyptic number.

It is an amenable number.

99623653 is a deficient number, since it is larger than the sum of its proper divisors (1).

99623653 is an equidigital number, since it uses as much as digits as its factorization.

99623653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 43.

The square root of 99623653 is about 9981.1649119730. The cubic root of 99623653 is about 463.5758686848.

It can be divided in two parts, 996 and 23653, that added together give a square (24649 = 157²).

The spelling of 99623653 in words is "ninety-nine million, six hundred twenty-three thousand, six hundred fifty-three".