73547989 has 2 divisors, whose sum is σ = 73547990. Its totient is φ = 73547988.

The previous prime is 73547987. The next prime is 73548037. The reversal of 73547989 is 98974537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 29789764 = 6615^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 73547989 - 2¹ = 73547987 is a prime.

It is a super-3 number, since 3×73547989³ (a number of 25 digits) contains 333 as substring.

Together with 73547987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73547983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36773994 + 36773995.

It is an arithmetic number, because the mean of its divisors is an integer number (36773995).

Almost surely, 2^73547989 is an apocalyptic number.

It is an amenable number.

73547989 is a deficient number, since it is larger than the sum of its proper divisors (1).

73547989 is an equidigital number, since it uses as much as digits as its factorization.

73547989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 73547989 is about 8576.0124183679. The cubic root of 73547989 is about 418.9770817356.

The spelling of 73547989 in words is "seventy-three million, five hundred forty-seven thousand, nine hundred eighty-nine".