76745789 has 2 divisors, whose sum is σ = 76745790. Its totient is φ = 76745788.

The previous prime is 76745729. The next prime is 76745791. The reversal of 76745789 is 98754767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69139225 + 7606564 = 8315^2 + 2758^2 .

It is an emirp because it is prime and its reverse (98754767) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76745789 is a prime.

It is a super-2 number, since 2×76745789² = 11779832258465042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 76745791, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 76745789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76745729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38372894 + 38372895.

It is an arithmetic number, because the mean of its divisors is an integer number (38372895).

Almost surely, 2^76745789 is an apocalyptic number.

It is an amenable number.

76745789 is a deficient number, since it is larger than the sum of its proper divisors (1).

76745789 is an equidigital number, since it uses as much as digits as its factorization.

76745789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The square root of 76745789 is about 8760.4673962067. The cubic root of 76745789 is about 424.9633906182.

The spelling of 76745789 in words is "seventy-six million, seven hundred forty-five thousand, seven hundred eighty-nine".