1087043381 has 4 divisors (see below), whose sum is σ = 1087117164. Its totient is φ = 1086969600.

The previous prime is 1087043369. The next prime is 1087043383. The reversal of 1087043381 is 1833407801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 698756356 + 388287025 = 26434^2 + 19705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087043381 - 2³⁰ = 13301557 is a prime.

It is a super-2 number, since 2×1087043381² = 2363326624351822322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087043383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6380 + ... + 47061.

It is an arithmetic number, because the mean of its divisors is an integer number (271779291).

Almost surely, 2^1087043381 is an apocalyptic number.

It is an amenable number.

1087043381 is a deficient number, since it is larger than the sum of its proper divisors (73783).

1087043381 is an equidigital number, since it uses as much as digits as its factorization.

1087043381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73782.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 1087043381 is about 32970.3409293868. The cubic root of 1087043381 is about 1028.2111095378.

The spelling of 1087043381 in words is "one billion, eighty-seven million, forty-three thousand, three hundred eighty-one".