99381013 has 2 divisors, whose sum is σ = 99381014. Its totient is φ = 99381012.

The previous prime is 99381011. The next prime is 99381053. The reversal of 99381013 is 31018399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79959364 + 19421649 = 8942^2 + 4407^2 .

It is a cyclic number.

It is not a de Polignac number, because 99381013 - 2¹ = 99381011 is a prime.

Together with 99381011, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 99381013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99381011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49690506 + 49690507.

It is an arithmetic number, because the mean of its divisors is an integer number (49690507).

Almost surely, 2^99381013 is an apocalyptic number.

It is an amenable number.

99381013 is a deficient number, since it is larger than the sum of its proper divisors (1).

99381013 is an equidigital number, since it uses as much as digits as its factorization.

99381013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 99381013 is about 9969.0026080847. The cubic root of 99381013 is about 463.1992061543.

The spelling of 99381013 in words is "ninety-nine million, three hundred eighty-one thousand, thirteen".