8601693981 has 4 divisors (see below), whose sum is σ = 11468925312. Its totient is φ = 5734462652.

The previous prime is 8601693967. The next prime is 8601694033. The reversal of 8601693981 is 1893961068.

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 8601693981 - 2¹⁴ = 8601677597 is a prime.

It is a super-2 number, since 2×8601693981² (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 (8601693901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433615661 + ... + 1433615666.

It is an arithmetic number, because the mean of its divisors is an integer number (2867231328).

Almost surely, 2^8601693981 is an apocalyptic number.

It is an amenable number.

8601693981 is a deficient number, since it is larger than the sum of its proper divisors (2867231331).

8601693981 is a wasteful number, since it uses less digits than its factorization.

8601693981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867231330.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 8601693981 is about 92745.3178386920. The cubic root of 8601693981 is about 2048.9341261372.

The spelling of 8601693981 in words is "eight billion, six hundred one million, six hundred ninety-three thousand, nine hundred eighty-one".