100523681 has 2 divisors, whose sum is σ = 100523682. Its totient is φ = 100523680.

The previous prime is 100523671. The next prime is 100523729. The reversal of 100523681 is 186325001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77088400 + 23435281 = 8780^2 + 4841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100523681 is a prime.

It is a super-2 number, since 2×100523681² = 20210020883579522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100523681.

It is not a weakly prime, because it can be changed into another prime (100523671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50261840 + 50261841.

It is an arithmetic number, because the mean of its divisors is an integer number (50261841).

Almost surely, 2^100523681 is an apocalyptic number.

It is an amenable number.

100523681 is a deficient number, since it is larger than the sum of its proper divisors (1).

100523681 is an equidigital number, since it uses as much as digits as its factorization.

100523681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 100523681 is about 10026.1498592431. The cubic root of 100523681 is about 464.9677104029.

Adding to 100523681 its reverse (186325001), we get a palindrome (286848682).

The spelling of 100523681 in words is "one hundred million, five hundred twenty-three thousand, six hundred eighty-one".