981296787 has 8 divisors (see below), whose sum is σ = 1309571536. Its totient is φ = 653609952.

The previous prime is 981296777. The next prime is 981296801. The reversal of 981296787 is 787692189.

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

It is not a de Polignac number, because 981296787 - 2¹⁸ = 981034643 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981296707) 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, 143068 + ... + 149769.

It is an arithmetic number, because the mean of its divisors is an integer number (163696442).

Almost surely, 2^981296787 is an apocalyptic number.

981296787 is a deficient number, since it is larger than the sum of its proper divisors (328274749).

981296787 is a wasteful number, since it uses less digits than its factorization.

981296787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293957.

The product of its digits is 3048192, while the sum is 57.

The square root of 981296787 is about 31325.6570082736. The cubic root of 981296787 is about 993.7263189009.

The spelling of 981296787 in words is "nine hundred eighty-one million, two hundred ninety-six thousand, seven hundred eighty-seven".