554539991 has 2 divisors, whose sum is σ = 554539992. Its totient is φ = 554539990.

The previous prime is 554539987. The next prime is 554540009. The reversal of 554539991 is 199935455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 554539991 - 2² = 554539987 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 (554539961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277269995 + 277269996.

It is an arithmetic number, because the mean of its divisors is an integer number (277269996).

Almost surely, 2^554539991 is an apocalyptic number.

554539991 is a deficient number, since it is larger than the sum of its proper divisors (1).

554539991 is an equidigital number, since it uses as much as digits as its factorization.

554539991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1093500, while the sum is 50.

The square root of 554539991 is about 23548.6728076127. The cubic root of 554539991 is about 821.5694663896.

The spelling of 554539991 in words is "five hundred fifty-four million, five hundred thirty-nine thousand, nine hundred ninety-one".