99919307 has 2 divisors, whose sum is σ = 99919308. Its totient is φ = 99919306.

The previous prime is 99919289. The next prime is 99919331. The reversal of 99919307 is 70391999.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (70391999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99919307 is a prime.

It is a super-2 number, since 2×99919307² = 19967735822720498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99919357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959653 + 49959654.

It is an arithmetic number, because the mean of its divisors is an integer number (49959654).

Almost surely, 2^99919307 is an apocalyptic number.

99919307 is a deficient number, since it is larger than the sum of its proper divisors (1).

99919307 is an equidigital number, since it uses as much as digits as its factorization.

99919307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 99919307 is about 9995.9645357514. The cubic root of 99919307 is about 464.0340018558.

The spelling of 99919307 in words is "ninety-nine million, nine hundred nineteen thousand, three hundred seven".