76200721 has 2 divisors, whose sum is σ = 76200722. Its totient is φ = 76200720.

The previous prime is 76200703. The next prime is 76200731. The reversal of 76200721 is 12700267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72437121 + 3763600 = 8511^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 76200721 - 2⁹ = 76200209 is a prime.

It is not a weakly prime, because it can be changed into another prime (76200731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38100360 + 38100361.

It is an arithmetic number, because the mean of its divisors is an integer number (38100361).

Almost surely, 2^76200721 is an apocalyptic number.

It is an amenable number.

76200721 is a deficient number, since it is larger than the sum of its proper divisors (1).

76200721 is an equidigital number, since it uses as much as digits as its factorization.

76200721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 76200721 is about 8729.3024349028. The cubic root of 76200721 is about 423.9549335779.

Adding to 76200721 its reverse (12700267), we get a palindrome (88900988).

The spelling of 76200721 in words is "seventy-six million, two hundred thousand, seven hundred twenty-one".