76788749 has 2 divisors, whose sum is σ = 76788750. Its totient is φ = 76788748.

The previous prime is 76788737. The next prime is 76788769. The reversal of 76788749 is 94788767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45630025 + 31158724 = 6755^2 + 5582^2 .

It is an emirp because it is prime and its reverse (94788767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76788749 - 2⁸ = 76788493 is a prime.

It is a super-3 number, since 3×76788749³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 76788694 and 76788703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76788769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38394374 + 38394375.

It is an arithmetic number, because the mean of its divisors is an integer number (38394375).

Almost surely, 2^76788749 is an apocalyptic number.

It is an amenable number.

76788749 is a deficient number, since it is larger than the sum of its proper divisors (1).

76788749 is an equidigital number, since it uses as much as digits as its factorization.

76788749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4741632, while the sum is 56.

The square root of 76788749 is about 8762.9189771445. The cubic root of 76788749 is about 425.0426697643.

The spelling of 76788749 in words is "seventy-six million, seven hundred eighty-eight thousand, seven hundred forty-nine".