8972262581 has 2 divisors, whose sum is σ = 8972262582. Its totient is φ = 8972262580.

The previous prime is 8972262553. The next prime is 8972262617. The reversal of 8972262581 is 1852622798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8231932900 + 740329681 = 90730^2 + 27209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8972262581 is a prime.

It is a super-2 number, since 2×8972262581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8972262521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4486131290 + 4486131291.

It is an arithmetic number, because the mean of its divisors is an integer number (4486131291).

Almost surely, 2^8972262581 is an apocalyptic number.

It is an amenable number.

8972262581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8972262581 is an equidigital number, since it uses as much as digits as its factorization.

8972262581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 8972262581 is about 94722.0279607653. The cubic root of 8972262581 is about 2077.9447293411.

The spelling of 8972262581 in words is "eight billion, nine hundred seventy-two million, two hundred sixty-two thousand, five hundred eighty-one".