1081491706 has 8 divisors (see below), whose sum is σ = 1626205140. Its totient is φ = 539423328.

The previous prime is 1081491679. The next prime is 1081491707. The reversal of 1081491706 is 6071941801.

It can be written as a sum of positive squares in 2 ways, for example, as 1014104025 + 67387681 = 31845^2 + 8209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1081491707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660241 + ... + 661876.

Almost surely, 2^1081491706 is an apocalyptic number.

1081491706 is a deficient number, since it is larger than the sum of its proper divisors (544713434).

1081491706 is a wasteful number, since it uses less digits than its factorization.

1081491706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322528.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1081491706 is about 32886.0412029177. The cubic root of 1081491706 is about 1026.4577176157.

The spelling of 1081491706 in words is "one billion, eighty-one million, four hundred ninety-one thousand, seven hundred six".