1081631297 has 8 divisors (see below), whose sum is σ = 1138946400. Its totient is φ = 1024354944.

The previous prime is 1081631293. The next prime is 1081631311. The reversal of 1081631297 is 7921361801.

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

It is a cyclic number.

It is not a de Polignac number, because 1081631297 - 2² = 1081631293 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 1081631297.

It is not an unprimeable number, because it can be changed into a prime (1081631293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60854 + ... + 76592.

It is an arithmetic number, because the mean of its divisors is an integer number (142368300).

Almost surely, 2^1081631297 is an apocalyptic number.

It is an amenable number.

1081631297 is a deficient number, since it is larger than the sum of its proper divisors (57315103).

1081631297 is a wasteful number, since it uses less digits than its factorization.

1081631297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19375.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1081631297 is about 32888.1634786742. The cubic root of 1081631297 is about 1026.5018782549.

The spelling of 1081631297 in words is "one billion, eighty-one million, six hundred thirty-one thousand, two hundred ninety-seven".