6213997 has 2 divisors, whose sum is σ = 6213998. Its totient is φ = 6213996.

The previous prime is 6213953. The next prime is 6214031. The reversal of 6213997 is 7993126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5103081 + 1110916 = 2259^2 + 1054^2 .

It is a cyclic number.

It is not a de Polignac number, because 6213997 - 2⁷ = 6213869 is a prime.

It is a super-3 number, since 3×6213997³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

6213997 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6213947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3106998 + 3106999.

It is an arithmetic number, because the mean of its divisors is an integer number (3106999).

Almost surely, 2^6213997 is an apocalyptic number.

It is an amenable number.

6213997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6213997 is an equidigital number, since it uses as much as digits as its factorization.

6213997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 6213997 is about 2492.7890002967. The cubic root of 6213997 is about 183.8471971002.

The spelling of 6213997 in words is "six million, two hundred thirteen thousand, nine hundred ninety-seven".