553605691 has 2 divisors, whose sum is σ = 553605692. Its totient is φ = 553605690.

The previous prime is 553605667. The next prime is 553605749. The reversal of 553605691 is 196506355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 553605691 - 2²¹ = 551508539 is a prime.

It is a super-2 number, since 2×553605691² = 612958522215174962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (553605491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276802845 + 276802846.

It is an arithmetic number, because the mean of its divisors is an integer number (276802846).

Almost surely, 2^553605691 is an apocalyptic number.

553605691 is a deficient number, since it is larger than the sum of its proper divisors (1).

553605691 is an equidigital number, since it uses as much as digits as its factorization.

553605691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 553605691 is about 23528.8268088318. The cubic root of 553605691 is about 821.1078081661.

The spelling of 553605691 in words is "five hundred fifty-three million, six hundred five thousand, six hundred ninety-one".