99938401 has 2 divisors, whose sum is σ = 99938402. Its totient is φ = 99938400.

The previous prime is 99938357. The next prime is 99938431. The reversal of 99938401 is 10483999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92621376 + 7317025 = 9624^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 99938401 - 2⁷ = 99938273 is a prime.

It is not a weakly prime, because it can be changed into another prime (99938431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49969200 + 49969201.

It is an arithmetic number, because the mean of its divisors is an integer number (49969201).

Almost surely, 2^99938401 is an apocalyptic number.

It is an amenable number.

99938401 is a deficient number, since it is larger than the sum of its proper divisors (1).

99938401 is an equidigital number, since it uses as much as digits as its factorization.

99938401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 99938401 is about 9996.9195755493. The cubic root of 99938401 is about 464.0635580419.

The spelling of 99938401 in words is "ninety-nine million, nine hundred thirty-eight thousand, four hundred one".