8961381 has 48 divisors (see below), whose sum is σ = 15789760. Its totient is φ = 4989600.

The previous prime is 8961373. The next prime is 8961383. The reversal of 8961381 is 1831698.

8961381 = 150² + 151² + ... + 311².

8961381 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8961381 - 2³ = 8961373 is a prime.

It is a super-2 number, since 2×8961381² = 160612698854322, 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 (8961383) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42366 + ... + 42576.

Almost surely, 2^8961381 is an apocalyptic number.

It is an amenable number.

8961381 is a deficient number, since it is larger than the sum of its proper divisors (6828379).

8961381 is a wasteful number, since it uses less digits than its factorization.

8961381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 238 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8961381 is about 2993.5565803906. The cubic root of 8961381 is about 207.7104344103.

The spelling of 8961381 in words is "eight million, nine hundred sixty-one thousand, three hundred eighty-one".