1361660893 has 4 divisors (see below), whose sum is σ = 1361753568. Its totient is φ = 1361568220.

The previous prime is 1361660887. The next prime is 1361660953. The reversal of 1361660893 is 3980661631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3980661631 = 163 ⋅24421237.

It is a cyclic number.

It is not a de Polignac number, because 1361660893 - 2⁹ = 1361660381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361660803) 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, 18871 + ... + 55492.

It is an arithmetic number, because the mean of its divisors is an integer number (340438392).

Almost surely, 2^1361660893 is an apocalyptic number.

It is an amenable number.

1361660893 is a deficient number, since it is larger than the sum of its proper divisors (92675).

1361660893 is an equidigital number, since it uses as much as digits as its factorization.

1361660893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92674.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1361660893 is about 36900.6896006023. The cubic root of 1361660893 is about 1108.3824864828.

The spelling of 1361660893 in words is "one billion, three hundred sixty-one million, six hundred sixty thousand, eight hundred ninety-three".