53761681 has 2 divisors, whose sum is σ = 53761682. Its totient is φ = 53761680.

The previous prime is 53761639. The next prime is 53761693. The reversal of 53761681 is 18616735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38551681 + 15210000 = 6209^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 53761681 - 2¹¹ = 53759633 is a prime.

It is a super-2 number, since 2×53761681² = 5780636687891522, 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 53761681.

It is not a weakly prime, because it can be changed into another prime (53761601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26880840 + 26880841.

It is an arithmetic number, because the mean of its divisors is an integer number (26880841).

Almost surely, 2^53761681 is an apocalyptic number.

It is an amenable number.

53761681 is a deficient number, since it is larger than the sum of its proper divisors (1).

53761681 is an equidigital number, since it uses as much as digits as its factorization.

53761681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 53761681 is about 7332.2357436187. The cubic root of 53761681 is about 377.4194521361.

The spelling of 53761681 in words is "fifty-three million, seven hundred sixty-one thousand, six hundred eighty-one".