7998013 has 2 divisors, whose sum is σ = 7998014. Its totient is φ = 7998012.

The previous prime is 7997989. The next prime is 7998019. The reversal of 7998013 is 3108997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7991929 + 6084 = 2827^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 7998013 - 2¹⁷ = 7866941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7998019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999006 + 3999007.

It is an arithmetic number, because the mean of its divisors is an integer number (3999007).

Almost surely, 2^7998013 is an apocalyptic number.

It is an amenable number.

7998013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7998013 is an equidigital number, since it uses as much as digits as its factorization.

7998013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7998013 is about 2828.0758476392. The cubic root of 7998013 is about 199.9834402956.

The spelling of 7998013 in words is "seven million, nine hundred ninety-eight thousand, thirteen".