549687091 has 2 divisors, whose sum is σ = 549687092. Its totient is φ = 549687090.

The previous prime is 549687079. The next prime is 549687101. The reversal of 549687091 is 190786945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549687091 - 2¹¹ = 549685043 is a prime.

It is not a weakly prime, because it can be changed into another prime (549688091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274843545 + 274843546.

It is an arithmetic number, because the mean of its divisors is an integer number (274843546).

Almost surely, 2^549687091 is an apocalyptic number.

549687091 is a deficient number, since it is larger than the sum of its proper divisors (1).

549687091 is an equidigital number, since it uses as much as digits as its factorization.

549687091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 549687091 is about 23445.4066076918. The cubic root of 549687091 is about 819.1658635498.

The spelling of 549687091 in words is "five hundred forty-nine million, six hundred eighty-seven thousand, ninety-one".