1362313721 has 4 divisors (see below), whose sum is σ = 1362419700. Its totient is φ = 1362207744.

The previous prime is 1362313703. The next prime is 1362313723. The reversal of 1362313721 is 1273132631.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 97515625 + 1264798096 = 9875^2 + 35564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1362313721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1362313723) 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, 30536 + ... + 60473.

It is an arithmetic number, because the mean of its divisors is an integer number (340604925).

Almost surely, 2^1362313721 is an apocalyptic number.

It is an amenable number.

1362313721 is a deficient number, since it is larger than the sum of its proper divisors (105979).

1362313721 is an equidigital number, since it uses as much as digits as its factorization.

1362313721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105978.

The product of its digits is 4536, while the sum is 29.

The square root of 1362313721 is about 36909.5342831632. The cubic root of 1362313721 is about 1108.5595906648.

The spelling of 1362313721 in words is "one billion, three hundred sixty-two million, three hundred thirteen thousand, seven hundred twenty-one".