53681933 has 2 divisors, whose sum is σ = 53681934. Its totient is φ = 53681932.

The previous prime is 53681899. The next prime is 53681963. The reversal of 53681933 is 33918635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46267204 + 7414729 = 6802^2 + 2723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53681933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53681963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26840966 + 26840967.

It is an arithmetic number, because the mean of its divisors is an integer number (26840967).

Almost surely, 2^53681933 is an apocalyptic number.

It is an amenable number.

53681933 is a deficient number, since it is larger than the sum of its proper divisors (1).

53681933 is an equidigital number, since it uses as much as digits as its factorization.

53681933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 53681933 is about 7326.7955478504. The cubic root of 53681933 is about 377.2327433101.

The spelling of 53681933 in words is "fifty-three million, six hundred eighty-one thousand, nine hundred thirty-three".