1081561927 has 2 divisors, whose sum is σ = 1081561928. Its totient is φ = 1081561926.

The previous prime is 1081561889. The next prime is 1081561933. The reversal of 1081561927 is 7291651801.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1081561927 - 2⁷ = 1081561799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1081561927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081561997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540780963 + 540780964.

It is an arithmetic number, because the mean of its divisors is an integer number (540780964).

Almost surely, 2^1081561927 is an apocalyptic number.

1081561927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081561927 is an equidigital number, since it uses as much as digits as its factorization.

1081561927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 40.

The square root of 1081561927 is about 32887.1088270161. The cubic root of 1081561927 is about 1026.4799330203.

The spelling of 1081561927 in words is "one billion, eighty-one million, five hundred sixty-one thousand, nine hundred twenty-seven".