76720037 has 2 divisors, whose sum is σ = 76720038. Its totient is φ = 76720036.

The previous prime is 76719989. The next prime is 76720067. The reversal of 76720037 is 73002767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56640676 + 20079361 = 7526^2 + 4481^2 .

It is a cyclic number.

It is not a de Polignac number, because 76720037 - 2⁸ = 76719781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76719985 and 76720012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76720067) 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, 38360018 + 38360019.

It is an arithmetic number, because the mean of its divisors is an integer number (38360019).

Almost surely, 2^76720037 is an apocalyptic number.

It is an amenable number.

76720037 is a deficient number, since it is larger than the sum of its proper divisors (1).

76720037 is an equidigital number, since it uses as much as digits as its factorization.

76720037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12348, while the sum is 32.

The square root of 76720037 is about 8758.9974882974. The cubic root of 76720037 is about 424.9158532369.

The spelling of 76720037 in words is "seventy-six million, seven hundred twenty thousand, thirty-seven".