1368440737 has 4 divisors (see below), whose sum is σ = 1368534960. Its totient is φ = 1368346516.

The previous prime is 1368440681. The next prime is 1368440747. The reversal of 1368440737 is 7370448631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1368440737 is a prime.

It is a super-2 number, since 2×1368440737² = 3745260101362206338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1368440693 and 1368440702.

It is not an unprimeable number, because it can be changed into a prime (1368440747) 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, 20203 + ... + 56080.

It is an arithmetic number, because the mean of its divisors is an integer number (342133740).

Almost surely, 2^1368440737 is an apocalyptic number.

It is an amenable number.

1368440737 is a deficient number, since it is larger than the sum of its proper divisors (94223).

1368440737 is an equidigital number, since it uses as much as digits as its factorization.

1368440737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94222.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 1368440737 is about 36992.4416198769. The cubic root of 1368440737 is about 1110.2190236844.

The spelling of 1368440737 in words is "one billion, three hundred sixty-eight million, four hundred forty thousand, seven hundred thirty-seven".