2656993 has 2 divisors, whose sum is σ = 2656994. Its totient is φ = 2656992.

The previous prime is 2656991. The next prime is 2657003. The reversal of 2656993 is 3996562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364224 + 1292769 = 1168^2 + 1137^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656993 - 2¹ = 2656991 is a prime.

It is a super-2 number, since 2×2656993² = 14119223604098, which contains 22 as substring.

Together with 2656991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2656991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328496 + 1328497.

It is an arithmetic number, because the mean of its divisors is an integer number (1328497).

2^2656993 is an apocalyptic number.

It is an amenable number.

2656993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656993 is an equidigital number, since it uses as much as digits as its factorization.

2656993 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2656993 is about 1630.0285273577. The cubic root of 2656993 is about 138.5043680498.

It can be divided in two parts, 26569 and 93, that added together give a palindrome (26662).

The spelling of 2656993 in words is "two million, six hundred fifty-six thousand, nine hundred ninety-three".