556369091 has 2 divisors, whose sum is σ = 556369092. Its totient is φ = 556369090.

The previous prime is 556369087. The next prime is 556369117. The reversal of 556369091 is 190963655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556369091 - 2² = 556369087 is a prime.

It is not a weakly prime, because it can be changed into another prime (556366091) 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, 278184545 + 278184546.

It is an arithmetic number, because the mean of its divisors is an integer number (278184546).

Almost surely, 2^556369091 is an apocalyptic number.

556369091 is a deficient number, since it is larger than the sum of its proper divisors (1).

556369091 is an equidigital number, since it uses as much as digits as its factorization.

556369091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 556369091 is about 23587.4774191731. The cubic root of 556369091 is about 822.4717659214.

The spelling of 556369091 in words is "five hundred fifty-six million, three hundred sixty-nine thousand, ninety-one".