3997567913 has 2 divisors, whose sum is σ = 3997567914. Its totient is φ = 3997567912.

The previous prime is 3997567907. The next prime is 3997567921. The reversal of 3997567913 is 3197657993.

3997567913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2945992729 + 1051575184 = 54277^2 + 32428^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997567913 - 2⁴ = 3997567897 is a prime.

It is not a weakly prime, because it can be changed into another prime (3997567933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998783956 + 1998783957.

It is an arithmetic number, because the mean of its divisors is an integer number (1998783957).

Almost surely, 2^3997567913 is an apocalyptic number.

It is an amenable number.

3997567913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3997567913 is an equidigital number, since it uses as much as digits as its factorization.

3997567913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9644670, while the sum is 59.

The square root of 3997567913 is about 63226.3229438499. The cubic root of 3997567913 is about 1587.0792619524.

The spelling of 3997567913 in words is "three billion, nine hundred ninety-seven million, five hundred sixty-seven thousand, nine hundred thirteen".