1368292981 has 8 divisors (see below), whose sum is σ = 1527397344. Its totient is φ = 1214974320.

The previous prime is 1368292969. The next prime is 1368292987. The reversal of 1368292981 is 1892928631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1368292981 - 2⁹ = 1368292469 is a prime.

It is a super-2 number, since 2×1368292981² = 3744451363707732722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368292987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445926 + ... + 1446871.

It is an arithmetic number, because the mean of its divisors is an integer number (190924668).

Almost surely, 2^1368292981 is an apocalyptic number.

1368292981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1368292981 is a deficient number, since it is larger than the sum of its proper divisors (159104363).

1368292981 is a wasteful number, since it uses less digits than its factorization.

1368292981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892851.

The product of its digits is 373248, while the sum is 49.

The square root of 1368292981 is about 36990.4444552914. Note that the first 4 decimals coincide. The cubic root of 1368292981 is about 1110.1790639887.

The spelling of 1368292981 in words is "one billion, three hundred sixty-eight million, two hundred ninety-two thousand, nine hundred eighty-one".