1393131847661 has 4 divisors (see below), whose sum is σ = 1394549073312. Its totient is φ = 1391714622012.

The previous prime is 1393131847607. The next prime is 1393131847687. The reversal of 1393131847661 is 1667481313931.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393131847661 is a prime.

It is a super-2 number, since 2×1393131847661² (a number of 25 digits) 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 (1393121847661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708611351 + ... + 708613316.

It is an arithmetic number, because the mean of its divisors is an integer number (348637268328).

Almost surely, 2^{1393131847661} is an apocalyptic number.

It is an amenable number.

1393131847661 is a deficient number, since it is larger than the sum of its proper divisors (1417225651).

1393131847661 is an equidigital number, since it uses as much as digits as its factorization.

1393131847661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417225650.

The product of its digits is 1959552, while the sum is 53.

The spelling of 1393131847661 in words is "one trillion, three hundred ninety-three billion, one hundred thirty-one million, eight hundred forty-seven thousand, six hundred sixty-one".