4087321913 has 2 divisors, whose sum is σ = 4087321914. Its totient is φ = 4087321912.

The previous prime is 4087321891. The next prime is 4087321921. The reversal of 4087321913 is 3191237804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4079632384 + 7689529 = 63872^2 + 2773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4087321913 is a prime.

It is not a weakly prime, because it can be changed into another prime (4087321963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2043660956 + 2043660957.

It is an arithmetic number, because the mean of its divisors is an integer number (2043660957).

Almost surely, 2^4087321913 is an apocalyptic number.

It is an amenable number.

4087321913 is a deficient number, since it is larger than the sum of its proper divisors (1).

4087321913 is an equidigital number, since it uses as much as digits as its factorization.

4087321913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 4087321913 is about 63932.1664969990. The cubic root of 4087321913 is about 1598.8692418097.

The spelling of 4087321913 in words is "four billion, eighty-seven million, three hundred twenty-one thousand, nine hundred thirteen".