6256993 has 2 divisors, whose sum is σ = 6256994. Its totient is φ = 6256992.

The previous prime is 6256981. The next prime is 6257029. The reversal of 6256993 is 3996526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6185169 + 71824 = 2487^2 + 268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6256993 is a prime.

It is a super-2 number, since 2×6256993² = 78299922804098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6256933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128496 + 3128497.

It is an arithmetic number, because the mean of its divisors is an integer number (3128497).

Almost surely, 2^6256993 is an apocalyptic number.

It is an amenable number.

6256993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6256993 is an equidigital number, since it uses as much as digits as its factorization.

6256993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The square root of 6256993 is about 2501.3982090023. The cubic root of 6256993 is about 184.2702491450.

Subtracting from 6256993 its sum of digits (40), we obtain a triangular number (6256953 = T₃₅₃₇).

The spelling of 6256993 in words is "six million, two hundred fifty-six thousand, nine hundred ninety-three".