554613991 has 2 divisors, whose sum is σ = 554613992. Its totient is φ = 554613990.

The previous prime is 554613977. The next prime is 554614097. The reversal of 554613991 is 199316455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 554613991 - 2¹¹ = 554611943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554613791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277306995 + 277306996.

It is an arithmetic number, because the mean of its divisors is an integer number (277306996).

Almost surely, 2^554613991 is an apocalyptic number.

554613991 is a deficient number, since it is larger than the sum of its proper divisors (1).

554613991 is an equidigital number, since it uses as much as digits as its factorization.

554613991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 554613991 is about 23550.2439690123. The cubic root of 554613991 is about 821.6060092524.

The spelling of 554613991 in words is "five hundred fifty-four million, six hundred thirteen thousand, nine hundred ninety-one".