76836521 has 2 divisors, whose sum is σ = 76836522. Its totient is φ = 76836520.

The previous prime is 76836517. The next prime is 76836523. The reversal of 76836521 is 12563867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40704400 + 36132121 = 6380^2 + 6011^2 .

It is a cyclic number.

It is not a de Polignac number, because 76836521 - 2² = 76836517 is a prime.

Together with 76836523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76836523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38418260 + 38418261.

It is an arithmetic number, because the mean of its divisors is an integer number (38418261).

Almost surely, 2^76836521 is an apocalyptic number.

It is an amenable number.

76836521 is a deficient number, since it is larger than the sum of its proper divisors (1).

76836521 is an equidigital number, since it uses as much as digits as its factorization.

76836521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 76836521 is about 8765.6443573761. The cubic root of 76836521 is about 425.1307943458.

The spelling of 76836521 in words is "seventy-six million, eight hundred thirty-six thousand, five hundred twenty-one".