840248567 has 2 divisors, whose sum is σ = 840248568. Its totient is φ = 840248566.

The previous prime is 840248557. The next prime is 840248597. The reversal of 840248567 is 765842048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840248567 - 2¹⁸ = 839986423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840248557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420124283 + 420124284.

It is an arithmetic number, because the mean of its divisors is an integer number (420124284).

Almost surely, 2^840248567 is an apocalyptic number.

840248567 is a deficient number, since it is larger than the sum of its proper divisors (1).

840248567 is an equidigital number, since it uses as much as digits as its factorization.

840248567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 840248567 is about 28987.0413633403. The cubic root of 840248567 is about 943.6318553800.

The spelling of 840248567 in words is "eight hundred forty million, two hundred forty-eight thousand, five hundred sixty-seven".