53837821 has 2 divisors, whose sum is σ = 53837822. Its totient is φ = 53837820.

The previous prime is 53837803. The next prime is 53837831. The reversal of 53837821 is 12873835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48024900 + 5812921 = 6930^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 53837821 - 2⁹ = 53837309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53837801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26918910 + 26918911.

It is an arithmetic number, because the mean of its divisors is an integer number (26918911).

Almost surely, 2^53837821 is an apocalyptic number.

It is an amenable number.

53837821 is a deficient number, since it is larger than the sum of its proper divisors (1).

53837821 is an equidigital number, since it uses as much as digits as its factorization.

53837821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 53837821 is about 7337.4260473275. The cubic root of 53837821 is about 377.5975415676.

The spelling of 53837821 in words is "fifty-three million, eight hundred thirty-seven thousand, eight hundred twenty-one".