534555691 has 2 divisors, whose sum is σ = 534555692. Its totient is φ = 534555690.

The previous prime is 534555617. The next prime is 534555727. The reversal of 534555691 is 196555435.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-534555691 is a prime.

It is not a weakly prime, because it can be changed into another prime (534555601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267277845 + 267277846.

It is an arithmetic number, because the mean of its divisors is an integer number (267277846).

Almost surely, 2^534555691 is an apocalyptic number.

534555691 is a deficient number, since it is larger than the sum of its proper divisors (1).

534555691 is an equidigital number, since it uses as much as digits as its factorization.

534555691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 43.

The square root of 534555691 is about 23120.4604409168. The cubic root of 534555691 is about 811.5793455434.

The spelling of 534555691 in words is "five hundred thirty-four million, five hundred fifty-five thousand, six hundred ninety-one".