1373754325721 has 4 divisors (see below), whose sum is σ = 1373845083600. Its totient is φ = 1373663567844.

The previous prime is 1373754325717. The next prime is 1373754325763. The reversal of 1373754325721 is 1275234573731.

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 not a de Polignac number, because 1373754325721 - 2² = 1373754325717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373754325721.

It is not an unprimeable number, because it can be changed into a prime (1373754315721) 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, 45356231 + ... + 45386508.

It is an arithmetic number, because the mean of its divisors is an integer number (343461270900).

Almost surely, 2^{1373754325721} is an apocalyptic number.

It is an amenable number.

1373754325721 is a deficient number, since it is larger than the sum of its proper divisors (90757879).

1373754325721 is an equidigital number, since it uses as much as digits as its factorization.

1373754325721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90757878.

The product of its digits is 3704400, while the sum is 50.

The spelling of 1373754325721 in words is "one trillion, three hundred seventy-three billion, seven hundred fifty-four million, three hundred twenty-five thousand, seven hundred twenty-one".