8812997981 has 16 divisors (see below), whose sum is σ = 9347788800. Its totient is φ = 8285473008.

The previous prime is 8812997939. The next prime is 8812997983. The reversal of 8812997981 is 1897992188.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8812997981 - 2¹⁰ = 8812996957 is a prime.

It is a super-2 number, since 2×8812997981² (a number of 21 digits) 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 (8812997983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2279456 + ... + 2283318.

It is an arithmetic number, because the mean of its divisors is an integer number (584236800).

Almost surely, 2^8812997981 is an apocalyptic number.

It is an amenable number.

8812997981 is a deficient number, since it is larger than the sum of its proper divisors (534790819).

8812997981 is a wasteful number, since it uses less digits than its factorization.

8812997981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768.

The product of its digits is 5225472, while the sum is 62.

The square root of 8812997981 is about 93877.5691046589. The cubic root of 8812997981 is about 2065.5762124763.

The spelling of 8812997981 in words is "eight billion, eight hundred twelve million, nine hundred ninety-seven thousand, nine hundred eighty-one".