840369613 has 2 divisors, whose sum is σ = 840369614. Its totient is φ = 840369612.

The previous prime is 840369581. The next prime is 840369623. The reversal of 840369613 is 316963048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 727542729 + 112826884 = 26973^2 + 10622^2 .

It is a cyclic number.

It is not a de Polignac number, because 840369613 - 2⁵ = 840369581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840369623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420184806 + 420184807.

It is an arithmetic number, because the mean of its divisors is an integer number (420184807).

Almost surely, 2^840369613 is an apocalyptic number.

It is an amenable number.

840369613 is a deficient number, since it is larger than the sum of its proper divisors (1).

840369613 is an equidigital number, since it uses as much as digits as its factorization.

840369613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 840369613 is about 28989.1292211408. The cubic root of 840369613 is about 943.6771663278.

The spelling of 840369613 in words is "eight hundred forty million, three hundred sixty-nine thousand, six hundred thirteen".