690824786513 has 2 divisors, whose sum is σ = 690824786514. Its totient is φ = 690824786512.

The previous prime is 690824786507. The next prime is 690824786521. The reversal of 690824786513 is 315687428096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678106134784 + 12718651729 = 823472^2 + 112777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690824786513 is a prime.

It is not a weakly prime, because it can be changed into another prime (690824786413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345412393256 + 345412393257.

It is an arithmetic number, because the mean of its divisors is an integer number (345412393257).

It is a 2-persistent number, because it is pandigital, and so is 2⋅690824786513 = 1381649573026, but 3⋅690824786513 = 2072474359539 is not.

Almost surely, 2^690824786513 is an apocalyptic number.

It is an amenable number.

690824786513 is a deficient number, since it is larger than the sum of its proper divisors (1).

690824786513 is an equidigital number, since it uses as much as digits as its factorization.

690824786513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 690824786513 in words is "six hundred ninety billion, eight hundred twenty-four million, seven hundred eighty-six thousand, five hundred thirteen".