3121663 has 2 divisors, whose sum is σ = 3121664. Its totient is φ = 3121662.

The previous prime is 3121633. The next prime is 3121667. The reversal of 3121663 is 3661213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121663 - 2¹³ = 3113471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560831 + 1560832.

It is an arithmetic number, because the mean of its divisors is an integer number (1560832).

Almost surely, 2^3121663 is an apocalyptic number.

3121663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121663 is an equidigital number, since it uses as much as digits as its factorization.

3121663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 3121663 is about 1766.8228547311. The cubic root of 3121663 is about 146.1488286579.

Adding to 3121663 its reverse (3661213), we get a palindrome (6782876).

The spelling of 3121663 in words is "three million, one hundred twenty-one thousand, six hundred sixty-three".