73664999 has 2 divisors, whose sum is σ = 73665000. Its totient is φ = 73664998.

The previous prime is 73664989. The next prime is 73665019. The reversal of 73664999 is 99946637.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73664999 - 2¹² = 73660903 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73664999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73664909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36832499 + 36832500.

It is an arithmetic number, because the mean of its divisors is an integer number (36832500).

Almost surely, 2^73664999 is an apocalyptic number.

73664999 is a deficient number, since it is larger than the sum of its proper divisors (1).

73664999 is an equidigital number, since it uses as much as digits as its factorization.

73664999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 73664999 is about 8582.8316422961. The cubic root of 73664999 is about 419.1991523125.

The spelling of 73664999 in words is "seventy-three million, six hundred sixty-four thousand, nine hundred ninety-nine".