1081904381 has 8 divisors (see below), whose sum is σ = 1119507840. Its totient is φ = 1044866592.

The previous prime is 1081904377. The next prime is 1081904393. The reversal of 1081904381 is 1834091801.

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 1081904381 - 2² = 1081904377 is a prime.

It is a super-2 number, since 2×1081904381² = 2341034179253986322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081904081) 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, 137525 + ... + 145178.

It is an arithmetic number, because the mean of its divisors is an integer number (139938480).

Almost surely, 2^1081904381 is an apocalyptic number.

It is an amenable number.

1081904381 is a deficient number, since it is larger than the sum of its proper divisors (37603459).

1081904381 is an equidigital number, since it uses as much as digits as its factorization.

1081904381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282835.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1081904381 is about 32892.3149230941. The cubic root of 1081904381 is about 1026.5882594002.

The spelling of 1081904381 in words is "one billion, eighty-one million, nine hundred four thousand, three hundred eighty-one".