76243289 has 2 divisors, whose sum is σ = 76243290. Its totient is φ = 76243288.

The previous prime is 76243243. The next prime is 76243301. The reversal of 76243289 is 98234267.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 1247689 = 8660^2 + 1117^2 .

It is an emirp because it is prime and its reverse (98234267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76243289 - 2⁸ = 76243033 is a prime.

It is not a weakly prime, because it can be changed into another prime (76240289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38121644 + 38121645.

It is an arithmetic number, because the mean of its divisors is an integer number (38121645).

Almost surely, 2^76243289 is an apocalyptic number.

It is an amenable number.

76243289 is a deficient number, since it is larger than the sum of its proper divisors (1).

76243289 is an equidigital number, since it uses as much as digits as its factorization.

76243289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 76243289 is about 8731.7403190887. The cubic root of 76243289 is about 424.0338635141.

The spelling of 76243289 in words is "seventy-six million, two hundred forty-three thousand, two hundred eighty-nine".