99945553 has 2 divisors, whose sum is σ = 99945554. Its totient is φ = 99945552.

The previous prime is 99945497. The next prime is 99945563. The reversal of 99945553 is 35554999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98247744 + 1697809 = 9912^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 99945553 - 2¹³ = 99937361 is a prime.

It is a super-2 number, since 2×99945553² = 19978227128951618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99945497 and 99945506.

It is not a weakly prime, because it can be changed into another prime (99945563) 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, 49972776 + 49972777.

It is an arithmetic number, because the mean of its divisors is an integer number (49972777).

Almost surely, 2^99945553 is an apocalyptic number.

It is an amenable number.

99945553 is a deficient number, since it is larger than the sum of its proper divisors (1).

99945553 is an equidigital number, since it uses as much as digits as its factorization.

99945553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1093500, while the sum is 49.

The square root of 99945553 is about 9997.2772793396. The cubic root of 99945553 is about 464.0746278722.

The spelling of 99945553 in words is "ninety-nine million, nine hundred forty-five thousand, five hundred fifty-three".