1081486691 has 2 divisors, whose sum is σ = 1081486692. Its totient is φ = 1081486690.

The previous prime is 1081486687. The next prime is 1081486699. The reversal of 1081486691 is 1966841801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1081486691 - 2² = 1081486687 is a prime.

It is a super-2 number, since 2×1081486691² = 2339226925620258962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1081486699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540743345 + 540743346.

It is an arithmetic number, because the mean of its divisors is an integer number (540743346).

Almost surely, 2^1081486691 is an apocalyptic number.

1081486691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081486691 is an equidigital number, since it uses as much as digits as its factorization.

1081486691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 1081486691 is about 32885.9649546733. The cubic root of 1081486691 is about 1026.4561310129.

The spelling of 1081486691 in words is "one billion, eighty-one million, four hundred eighty-six thousand, six hundred ninety-one".