840356093 has 2 divisors, whose sum is σ = 840356094. Its totient is φ = 840356092.

The previous prime is 840356089. The next prime is 840356107. The reversal of 840356093 is 390653048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 814417444 + 25938649 = 28538^2 + 5093^2 .

It is a cyclic number.

It is not a de Polignac number, because 840356093 - 2² = 840356089 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (843356093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420178046 + 420178047.

It is an arithmetic number, because the mean of its divisors is an integer number (420178047).

Almost surely, 2^840356093 is an apocalyptic number.

It is an amenable number.

840356093 is a deficient number, since it is larger than the sum of its proper divisors (1).

840356093 is an equidigital number, since it uses as much as digits as its factorization.

840356093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 840356093 is about 28988.8960293420. The cubic root of 840356093 is about 943.6721056246.

The spelling of 840356093 in words is "eight hundred forty million, three hundred fifty-six thousand, ninety-three".