99988477 has 2 divisors, whose sum is σ = 99988478. Its totient is φ = 99988476.

The previous prime is 99988453. The next prime is 99988481. The reversal of 99988477 is 77488999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76842756 + 23145721 = 8766^2 + 4811^2 .

It is a cyclic number.

It is not a de Polignac number, because 99988477 - 2⁷ = 99988349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99988487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994238 + 49994239.

It is an arithmetic number, because the mean of its divisors is an integer number (49994239).

Almost surely, 2^99988477 is an apocalyptic number.

It is an amenable number.

99988477 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988477 is an equidigital number, since it uses as much as digits as its factorization.

99988477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 61.

The square root of 99988477 is about 9999.4238334016. The cubic root of 99988477 is about 464.1410543337.

The spelling of 99988477 in words is "ninety-nine million, nine hundred eighty-eight thousand, four hundred seventy-seven".