1373661356 has 6 divisors (see below), whose sum is σ = 2403907380. Its totient is φ = 686830676.

The previous prime is 1373661323. The next prime is 1373661389. The reversal of 1373661356 is 6531663731.

It is an interprime number because it is at equal distance from previous prime (1373661323) and next prime (1373661389).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171707666 + ... + 171707673.

It is an arithmetic number, because the mean of its divisors is an integer number (400651230).

Almost surely, 2^1373661356 is an apocalyptic number.

It is an amenable number.

1373661356 is a deficient number, since it is larger than the sum of its proper divisors (1030246024).

1373661356 is a wasteful number, since it uses less digits than its factorization.

1373661356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343415343 (or 343415341 counting only the distinct ones).

The product of its digits is 204120, while the sum is 41.

The square root of 1373661356 is about 37062.9377680723. The cubic root of 1373661356 is about 1111.6290653743.

The spelling of 1373661356 in words is "one billion, three hundred seventy-three million, six hundred sixty-one thousand, three hundred fifty-six".