73864489 has 2 divisors, whose sum is σ = 73864490. Its totient is φ = 73864488.

The previous prime is 73864463. The next prime is 73864499. The reversal of 73864489 is 98446837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73822464 + 42025 = 8592^2 + 205^2 .

It is an emirp because it is prime and its reverse (98446837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73864489 - 2¹³ = 73856297 is a prime.

It is a super-2 number, since 2×73864489² = 10911925470462242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73864429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36932244 + 36932245.

It is an arithmetic number, because the mean of its divisors is an integer number (36932245).

Almost surely, 2^73864489 is an apocalyptic number.

It is an amenable number.

73864489 is a deficient number, since it is larger than the sum of its proper divisors (1).

73864489 is an equidigital number, since it uses as much as digits as its factorization.

73864489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 73864489 is about 8594.4452409681. The cubic root of 73864489 is about 419.5772181737.

The spelling of 73864489 in words is "seventy-three million, eight hundred sixty-four thousand, four hundred eighty-nine".