8603745981 has 4 divisors (see below), whose sum is σ = 11471661312. Its totient is φ = 5735830652.

The previous prime is 8603745961. The next prime is 8603746007. The reversal of 8603745981 is 1895473068.

8603745981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8603745981 - 2⁵ = 8603745949 is a prime.

It is a super-2 number, since 2×8603745981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8603745961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433957661 + ... + 1433957666.

It is an arithmetic number, because the mean of its divisors is an integer number (2867915328).

Almost surely, 2^8603745981 is an apocalyptic number.

It is an amenable number.

8603745981 is a deficient number, since it is larger than the sum of its proper divisors (2867915331).

8603745981 is a wasteful number, since it uses less digits than its factorization.

8603745981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867915330.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 8603745981 is about 92756.3797320702. The cubic root of 8603745981 is about 2049.0970428274.

The spelling of 8603745981 in words is "eight billion, six hundred three million, seven hundred forty-five thousand, nine hundred eighty-one".