73982989 has 2 divisors, whose sum is σ = 73982990. Its totient is φ = 73982988.

The previous prime is 73982977. The next prime is 73982999. The reversal of 73982989 is 98928937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55621764 + 18361225 = 7458^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 73982989 - 2⁹ = 73982477 is a prime.

It is a super-2 number, since 2×73982989² = 10946965322748242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73982959) 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, 36991494 + 36991495.

It is an arithmetic number, because the mean of its divisors is an integer number (36991495).

Almost surely, 2^73982989 is an apocalyptic number.

It is an amenable number.

73982989 is a deficient number, since it is larger than the sum of its proper divisors (1).

73982989 is an equidigital number, since it uses as much as digits as its factorization.

73982989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 73982989 is about 8601.3364659220. The cubic root of 73982989 is about 419.8014726896.

The spelling of 73982989 in words is "seventy-three million, nine hundred eighty-two thousand, nine hundred eighty-nine".