99478913 has 2 divisors, whose sum is σ = 99478914. Its totient is φ = 99478912.

The previous prime is 99478901. The next prime is 99478921. The reversal of 99478913 is 31987499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75203584 + 24275329 = 8672^2 + 4927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99478913 is a prime.

It is not a weakly prime, because it can be changed into another prime (99478943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49739456 + 49739457.

It is an arithmetic number, because the mean of its divisors is an integer number (49739457).

Almost surely, 2^99478913 is an apocalyptic number.

It is an amenable number.

99478913 is a deficient number, since it is larger than the sum of its proper divisors (1).

99478913 is an equidigital number, since it uses as much as digits as its factorization.

99478913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 99478913 is about 9973.9116198210. The cubic root of 99478913 is about 463.3512550504.

The spelling of 99478913 in words is "ninety-nine million, four hundred seventy-eight thousand, nine hundred thirteen".