76023721 has 2 divisors, whose sum is σ = 76023722. Its totient is φ = 76023720.

The previous prime is 76023719. The next prime is 76023737. The reversal of 76023721 is 12732067.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50410000 + 25613721 = 7100^2 + 5061^2 .

It is an emirp because it is prime and its reverse (12732067) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76023721 - 2¹ = 76023719 is a prime.

Together with 76023719, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 76023721.

It is not a weakly prime, because it can be changed into another prime (76023781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38011860 + 38011861.

It is an arithmetic number, because the mean of its divisors is an integer number (38011861).

Almost surely, 2^76023721 is an apocalyptic number.

It is an amenable number.

76023721 is a deficient number, since it is larger than the sum of its proper divisors (1).

76023721 is an equidigital number, since it uses as much as digits as its factorization.

76023721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 76023721 is about 8719.1582735950. The cubic root of 76023721 is about 423.6264231270.

Adding to 76023721 its reverse (12732067), we get a palindrome (88755788).

The spelling of 76023721 in words is "seventy-six million, twenty-three thousand, seven hundred twenty-one".