1363915381 has 8 divisors (see below), whose sum is σ = 1372546080. Its totient is φ = 1355296272.

The previous prime is 1363915309. The next prime is 1363915393. The reversal of 1363915381 is 1835193631.

It is a happy number.

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 1363915381 - 2⁹ = 1363914869 is a prime.

It is a super-2 number, since 2×1363915381² = 3720530333056750322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1363915781) 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, 408786 + ... + 412108.

It is an arithmetic number, because the mean of its divisors is an integer number (171568260).

Almost surely, 2^1363915381 is an apocalyptic number.

It is an amenable number.

1363915381 is a deficient number, since it is larger than the sum of its proper divisors (8630699).

1363915381 is a wasteful number, since it uses less digits than its factorization.

1363915381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795.

The product of its digits is 58320, while the sum is 40.

The square root of 1363915381 is about 36931.2250135302. The cubic root of 1363915381 is about 1108.9938617028.

The spelling of 1363915381 in words is "one billion, three hundred sixty-three million, nine hundred fifteen thousand, three hundred eighty-one".