8423751961 has 3 divisors (see below), whose sum is σ = 8423843743. Its totient is φ = 8423660180.

The previous prime is 8423751953. The next prime is 8423751967. The reversal of 8423751961 is 1691573248.

The square root of 8423751961 is 91781.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2473172361 + 5950579600 = 49731^2 + 77140^2 .

It is not a de Polignac number, because 8423751961 - 2³ = 8423751953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8423751967) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45891 + ... + 137671.

Almost surely, 2^8423751961 is an apocalyptic number.

8423751961 is the 91781-st square number.

8423751961 is the 45891-st centered octagonal number.

It is an amenable number.

8423751961 is a deficient number, since it is larger than the sum of its proper divisors (91782).

8423751961 is an frugal number, since it uses more digits than its factorization.

8423751961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183562 (or 91781 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The cubic root of 8423751961 is about 2034.7068952256.

It can be divided in two parts, 8423 and 751961, that added together give a square (760384 = 872²).

The spelling of 8423751961 in words is "eight billion, four hundred twenty-three million, seven hundred fifty-one thousand, nine hundred sixty-one".