1018091 has 2 divisors, whose sum is σ = 1018092. Its totient is φ = 1018090.

The previous prime is 1018057. The next prime is 1018097. The reversal of 1018091 is 1908101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1018097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509045 + 509046.

It is an arithmetic number, because the mean of its divisors is an integer number (509046).

2^1018091 is an apocalyptic number.

1018091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018091 is an equidigital number, since it uses as much as digits as its factorization.

1018091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1018091 is about 1009.0049553892. The cubic root of 1018091 is about 100.5994329551.

It can be divided in two parts, 101 and 8091, that added together give a 13-th power (8192 = 2¹³).

The spelling of 1018091 in words is "one million, eighteen thousand, ninety-one".