73999969 has 2 divisors, whose sum is σ = 73999970. Its totient is φ = 73999968.

The previous prime is 73999951. The next prime is 74000051. The reversal of 73999969 is 96999937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69505569 + 4494400 = 8337^2 + 2120^2 .

It is an emirp because it is prime and its reverse (96999937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73999969 - 2⁷ = 73999841 is a prime.

It is a super-2 number, since 2×73999969² = 10951990824001922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73999469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36999984 + 36999985.

It is an arithmetic number, because the mean of its divisors is an integer number (36999985).

Almost surely, 2^73999969 is an apocalyptic number.

It is an amenable number.

73999969 is a deficient number, since it is larger than the sum of its proper divisors (1).

73999969 is an equidigital number, since it uses as much as digits as its factorization.

73999969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7440174, while the sum is 61.

The square root of 73999969 is about 8602.3234652040. The cubic root of 73999969 is about 419.8335867554.

The spelling of 73999969 in words is "seventy-three million, nine hundred ninety-nine thousand, nine hundred sixty-nine".