1357663 has 4 divisors (see below), whose sum is σ = 1360000. Its totient is φ = 1355328.

The previous prime is 1357661. The next prime is 1357669. The reversal of 1357663 is 3667531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1357663 - 2¹ = 1357661 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁴ + 5 + 7⁷ + 6⁴ + 6⁴ + 3¹² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1357661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (340000).

2^1357663 is an apocalyptic number.

1357663 is a deficient number, since it is larger than the sum of its proper divisors (2337).

1357663 is a wasteful number, since it uses less digits than its factorization.

1357663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its digits is 11340, while the sum is 31.

The square root of 1357663 is about 1165.1879676687. The cubic root of 1357663 is about 110.7296670766.

The spelling of 1357663 in words is "one million, three hundred fifty-seven thousand, six hundred sixty-three".