99967009 has 2 divisors, whose sum is σ = 99967010. Its totient is φ = 99967008.

The previous prime is 99967001. The next prime is 99967013. The reversal of 99967009 is 90076999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97950609 + 2016400 = 9897^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 99967009 - 2³ = 99967001 is a prime.

It is not a weakly prime, because it can be changed into another prime (99967001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49983504 + 49983505.

It is an arithmetic number, because the mean of its divisors is an integer number (49983505).

Almost surely, 2^99967009 is an apocalyptic number.

It is an amenable number.

99967009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99967009 is an equidigital number, since it uses as much as digits as its factorization.

99967009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 99967009 is about 9998.3503139268. The cubic root of 99967009 is about 464.1078341946.

The spelling of 99967009 in words is "ninety-nine million, nine hundred sixty-seven thousand, nine".