1356667823 has 4 divisors (see below), whose sum is σ = 1550477520. Its totient is φ = 1162858128.

The previous prime is 1356667817. The next prime is 1356667841. The reversal of 1356667823 is 3287666531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3287666531 = 2437 ⋅1349063.

It is a cyclic number.

It is not a de Polignac number, because 1356667823 - 2³⁰ = 282925999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356663823) 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, 96904838 + ... + 96904851.

It is an arithmetic number, because the mean of its divisors is an integer number (387619380).

Almost surely, 2^1356667823 is an apocalyptic number.

1356667823 is a deficient number, since it is larger than the sum of its proper divisors (193809697).

1356667823 is an equidigital number, since it uses as much as digits as its factorization.

1356667823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193809696.

The product of its digits is 1088640, while the sum is 47.

The square root of 1356667823 is about 36832.9719544866. The cubic root of 1356667823 is about 1107.0260524227.

The spelling of 1356667823 in words is "one billion, three hundred fifty-six million, six hundred sixty-seven thousand, eight hundred twenty-three".