1361594381 has 4 divisors (see below), whose sum is σ = 1556107872. Its totient is φ = 1167080892.

The previous prime is 1361594363. The next prime is 1361594419. The reversal of 1361594381 is 1834951631.

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 an emirpimes, since its reverse is a distinct semiprime: 1834951631 = 2017 ⋅909743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361594381 is a prime.

It is a super-2 number, since 2×1361594381² = 3707878516741546322, 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 (1361594281) 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, 97256735 + ... + 97256748.

It is an arithmetic number, because the mean of its divisors is an integer number (389026968).

Almost surely, 2^1361594381 is an apocalyptic number.

It is an amenable number.

1361594381 is a deficient number, since it is larger than the sum of its proper divisors (194513491).

1361594381 is an equidigital number, since it uses as much as digits as its factorization.

1361594381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194513490.

The product of its digits is 77760, while the sum is 41.

The square root of 1361594381 is about 36899.7883598267. The cubic root of 1361594381 is about 1108.3644394207.

The spelling of 1361594381 in words is "one billion, three hundred sixty-one million, five hundred ninety-four thousand, three hundred eighty-one".