1041681691 has 4 divisors (see below), whose sum is σ = 1044229000. Its totient is φ = 1039134384.

The previous prime is 1041681679. The next prime is 1041681709. The reversal of 1041681691 is 1961861401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1961861401 = 24989 ⋅78509.

It is a cyclic number.

It is not a de Polignac number, because 1041681691 - 2²³ = 1033293083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1041681691.

It is not an unprimeable number, because it can be changed into a prime (1041681601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273041 + ... + 1273858.

It is an arithmetic number, because the mean of its divisors is an integer number (261057250).

Almost surely, 2^1041681691 is an apocalyptic number.

1041681691 is a deficient number, since it is larger than the sum of its proper divisors (2547309).

1041681691 is an equidigital number, since it uses as much as digits as its factorization.

1041681691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547308.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1041681691 is about 32275.0939735270. The cubic root of 1041681691 is about 1013.7052062271.

The spelling of 1041681691 in words is "one billion, forty-one million, six hundred eighty-one thousand, six hundred ninety-one".