1083081721 has 8 divisors (see below), whose sum is σ = 1108879200. Its totient is φ = 1057312032.

The previous prime is 1083081709. The next prime is 1083081761. The reversal of 1083081721 is 1271803801.

It is a happy number.

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 1083081721 - 2¹³ = 1083073529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1083081761) 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, 86730 + ... + 98428.

It is an arithmetic number, because the mean of its divisors is an integer number (138609900).

Almost surely, 2^1083081721 is an apocalyptic number.

It is an amenable number.

1083081721 is a deficient number, since it is larger than the sum of its proper divisors (25797479).

1083081721 is a wasteful number, since it uses less digits than its factorization.

1083081721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13895.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1083081721 is about 32910.2069425277. The cubic root of 1083081721 is about 1026.9605058722.

The spelling of 1083081721 in words is "one billion, eighty-three million, eighty-one thousand, seven hundred twenty-one".