93763951681 has 3 divisors (see below), whose sum is σ = 93764257891. Its totient is φ = 93763645472.

The previous prime is 93763951667. The next prime is 93763951711. The reversal of 93763951681 is 18615936739.

It is a happy number.

The square root of 93763951681 is 306209.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18615936739 = 113 ⋅164742803.

It can be written as a sum of positive squares in only one way, i.e., 93274657281 + 489294400 = 305409^2 + 22120^2 .

It is not a de Polignac number, because 93763951681 - 2⁵ = 93763951649 is a prime.

It is a super-2 number, since 2×93763951681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93763951601) 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, 153105 + ... + 459313.

Almost surely, 2^93763951681 is an apocalyptic number.

93763951681 is the 306209-th square number.

93763951681 is the 153105-th centered octagonal number.

It is an amenable number.

93763951681 is a deficient number, since it is larger than the sum of its proper divisors (306210).

93763951681 is an frugal number, since it uses more digits than its factorization.

93763951681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612418 (or 306209 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 58.

The spelling of 93763951681 in words is "ninety-three billion, seven hundred sixty-three million, nine hundred fifty-one thousand, six hundred eighty-one".