553129991 has 2 divisors, whose sum is σ = 553129992. Its totient is φ = 553129990.

The previous prime is 553129949. The next prime is 553130041. The reversal of 553129991 is 199921355.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-553129991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553129891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276564995 + 276564996.

It is an arithmetic number, because the mean of its divisors is an integer number (276564996).

Almost surely, 2^553129991 is an apocalyptic number.

553129991 is a deficient number, since it is larger than the sum of its proper divisors (1).

553129991 is an equidigital number, since it uses as much as digits as its factorization.

553129991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109350, while the sum is 44.

The square root of 553129991 is about 23518.7157600070. The cubic root of 553129991 is about 820.8725547345.

The spelling of 553129991 in words is "five hundred fifty-three million, one hundred twenty-nine thousand, nine hundred ninety-one".