99400013 has 2 divisors, whose sum is σ = 99400014. Its totient is φ = 99400012.

The previous prime is 99400009. The next prime is 99400033. The reversal of 99400013 is 31000499.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50651689 + 48748324 = 7117^2 + 6982^2 .

It is an emirp because it is prime and its reverse (31000499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99400013 - 2² = 99400009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99400033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49700006 + 49700007.

It is an arithmetic number, because the mean of its divisors is an integer number (49700007).

Almost surely, 2^99400013 is an apocalyptic number.

It is an amenable number.

99400013 is a deficient number, since it is larger than the sum of its proper divisors (1).

99400013 is an equidigital number, since it uses as much as digits as its factorization.

99400013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 99400013 is about 9969.9555164504. The cubic root of 99400013 is about 463.2287229398.

The spelling of 99400013 in words is "ninety-nine million, four hundred thousand, thirteen".