868043961 has 6 divisors (see below), whose sum is σ = 1253841290. Its totient is φ = 578695968.

The previous prime is 868043951. The next prime is 868044011. The reversal of 868043961 is 169340868.

868043961 is a `hidden beast` number, since 86 + 80 + 439 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 859955625 + 8088336 = 29325^2 + 2844^2 .

It is not a de Polignac number, because 868043961 - 2⁷ = 868043833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868043951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48224656 + ... + 48224673.

Almost surely, 2^868043961 is an apocalyptic number.

It is an amenable number.

868043961 is a deficient number, since it is larger than the sum of its proper divisors (385797329).

868043961 is a wasteful number, since it uses less digits than its factorization.

868043961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96449335 (or 96449332 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 868043961 is about 29462.5857826498. The cubic root of 868043961 is about 953.9242882573.

The spelling of 868043961 in words is "eight hundred sixty-eight million, forty-three thousand, nine hundred sixty-one".