8972423505 has 24 divisors (see below), whose sum is σ = 15558482472. Its totient is φ = 4783359744.

The previous prime is 8972423491. The next prime is 8972423531. The reversal of 8972423505 is 5053242798.

It can be written as a sum of positive squares in 4 ways, for example, as 1037355264 + 7935068241 = 32208^2 + 89079^2 .

It is not a de Polignac number, because 8972423505 - 2⁸ = 8972423249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76077 + ... + 154053.

It is an arithmetic number, because the mean of its divisors is an integer number (648270103).

Almost surely, 2^8972423505 is an apocalyptic number.

It is an amenable number.

8972423505 is a deficient number, since it is larger than the sum of its proper divisors (6586058967).

8972423505 is a wasteful number, since it uses less digits than its factorization.

8972423505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80545 (or 80542 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 8972423505 is about 94722.8774108979. The cubic root of 8972423505 is about 2077.9571524126.

The spelling of 8972423505 in words is "eight billion, nine hundred seventy-two million, four hundred twenty-three thousand, five hundred five".