1403790316681 has 2 divisors, whose sum is σ = 1403790316682. Its totient is φ = 1403790316680.

The previous prime is 1403790316679. The next prime is 1403790316751. The reversal of 1403790316681 is 1866130973041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001168341056 + 402621975625 = 1000584^2 + 634525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403790316681 - 2¹ = 1403790316679 is a prime.

It is a super-2 number, since 2×1403790316681² (a number of 25 digits) contains 22 as substring.

Together with 1403790316679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1403790316661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701895158340 + 701895158341.

It is an arithmetic number, because the mean of its divisors is an integer number (701895158341).

Almost surely, 2^{1403790316681} is an apocalyptic number.

It is an amenable number.

1403790316681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403790316681 is an equidigital number, since it uses as much as digits as its factorization.

1403790316681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 1403790316681 in words is "one trillion, four hundred three billion, seven hundred ninety million, three hundred sixteen thousand, six hundred eighty-one".