99955481 has 2 divisors, whose sum is σ = 99955482. Its totient is φ = 99955480.

The previous prime is 99955451. The next prime is 99955483. The reversal of 99955481 is 18455999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97199881 + 2755600 = 9859^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 99955481 - 2²² = 95761177 is a prime.

It is a super-2 number, since 2×99955481² = 19982196363882722, which contains 22 as substring.

Together with 99955483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99955483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49977740 + 49977741.

It is an arithmetic number, because the mean of its divisors is an integer number (49977741).

Almost surely, 2^99955481 is an apocalyptic number.

It is an amenable number.

99955481 is a deficient number, since it is larger than the sum of its proper divisors (1).

99955481 is an equidigital number, since it uses as much as digits as its factorization.

99955481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 50.

The square root of 99955481 is about 9997.7738022022. The cubic root of 99955481 is about 464.0899935061.

The spelling of 99955481 in words is "ninety-nine million, nine hundred fifty-five thousand, four hundred eighty-one".