3236376721 has 2 divisors, whose sum is σ = 3236376722. Its totient is φ = 3236376720.

The previous prime is 3236376679. The next prime is 3236376739. The reversal of 3236376721 is 1276736323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2996467600 + 239909121 = 54740^2 + 15489^2 .

It is an emirp because it is prime and its reverse (1276736323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3236376721 - 2⁷ = 3236376593 is a prime.

It is not a weakly prime, because it can be changed into another prime (3236376821) 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, 1618188360 + 1618188361.

It is an arithmetic number, because the mean of its divisors is an integer number (1618188361).

Almost surely, 2^3236376721 is an apocalyptic number.

It is an amenable number.

3236376721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3236376721 is an equidigital number, since it uses as much as digits as its factorization.

3236376721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 40.

The square root of 3236376721 is about 56889.1617182043. The cubic root of 3236376721 is about 1479.1754478430.

The spelling of 3236376721 in words is "three billion, two hundred thirty-six million, three hundred seventy-six thousand, seven hundred twenty-one".