978811331 has 8 divisors (see below), whose sum is σ = 1003938624. Its totient is φ = 953863360.

The previous prime is 978811303. The next prime is 978811373. The reversal of 978811331 is 133118879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978811331 is a prime.

It is a super-2 number, since 2×978811331² = 1916143243387983122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978811531) 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, 33740 + ... + 55641.

It is an arithmetic number, because the mean of its divisors is an integer number (125492328).

Almost surely, 2^978811331 is an apocalyptic number.

978811331 is a deficient number, since it is larger than the sum of its proper divisors (25127293).

978811331 is a wasteful number, since it uses less digits than its factorization.

978811331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89661.

The product of its digits is 36288, while the sum is 41.

The square root of 978811331 is about 31285.9606053578. The cubic root of 978811331 is about 992.8866302835.

The spelling of 978811331 in words is "nine hundred seventy-eight million, eight hundred eleven thousand, three hundred thirty-one".