1368823637 has 4 divisors (see below), whose sum is σ = 1370623116. Its totient is φ = 1367024160.

The previous prime is 1368823619. The next prime is 1368823661. The reversal of 1368823637 is 7363288631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7363288631 = 6833 ⋅1077607.

It can be written as a sum of positive squares in 2 ways, for example, as 293573956 + 1075249681 = 17134^2 + 32791^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368823637 - 2¹⁰ = 1368822613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1368823591 and 1368823600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368823667) 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, 898598 + ... + 900119.

It is an arithmetic number, because the mean of its divisors is an integer number (342655779).

Almost surely, 2^1368823637 is an apocalyptic number.

It is an amenable number.

1368823637 is a deficient number, since it is larger than the sum of its proper divisors (1799479).

1368823637 is an equidigital number, since it uses as much as digits as its factorization.

1368823637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799478.

The product of its digits is 870912, while the sum is 47.

The square root of 1368823637 is about 36997.6166394540. The cubic root of 1368823637 is about 1110.3225632362.

The spelling of 1368823637 in words is "one billion, three hundred sixty-eight million, eight hundred twenty-three thousand, six hundred thirty-seven".