1081671961 has 8 divisors (see below), whose sum is σ = 1085036960. Its totient is φ = 1078313472.

The previous prime is 1081671953. The next prime is 1081671967. The reversal of 1081671961 is 1691761801.

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 1081671961 - 2³ = 1081671953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081671967) 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, 740650 + ... + 742108.

It is an arithmetic number, because the mean of its divisors is an integer number (135629620).

Almost surely, 2^1081671961 is an apocalyptic number.

It is an amenable number.

1081671961 is a deficient number, since it is larger than the sum of its proper divisors (3364999).

1081671961 is a wasteful number, since it uses less digits than its factorization.

1081671961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1081671961 is about 32888.7816892022. The cubic root of 1081671961 is about 1026.5147418956.

The spelling of 1081671961 in words is "one billion, eighty-one million, six hundred seventy-one thousand, nine hundred sixty-one".