76821337 has 2 divisors, whose sum is σ = 76821338. Its totient is φ = 76821336.

The previous prime is 76821293. The next prime is 76821373. The reversal of 76821337 is 73312867.

Together with next prime (76821373) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 20331081 = 7516^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 76821337 - 2⁷ = 76821209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76821296 and 76821305.

It is not a weakly prime, because it can be changed into another prime (76821137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38410668 + 38410669.

It is an arithmetic number, because the mean of its divisors is an integer number (38410669).

Almost surely, 2^76821337 is an apocalyptic number.

It is an amenable number.

76821337 is a deficient number, since it is larger than the sum of its proper divisors (1).

76821337 is an equidigital number, since it uses as much as digits as its factorization.

76821337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 76821337 is about 8764.7782059787. The cubic root of 76821337 is about 425.1027885175.

The spelling of 76821337 in words is "seventy-six million, eight hundred twenty-one thousand, three hundred thirty-seven".