52656991 has 2 divisors, whose sum is σ = 52656992. Its totient is φ = 52656990.

The previous prime is 52656979. The next prime is 52657009. The reversal of 52656991 is 19965625.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52656991 - 2¹⁵ = 52624223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52656491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26328495 + 26328496.

It is an arithmetic number, because the mean of its divisors is an integer number (26328496).

Almost surely, 2^52656991 is an apocalyptic number.

52656991 is a deficient number, since it is larger than the sum of its proper divisors (1).

52656991 is an equidigital number, since it uses as much as digits as its factorization.

52656991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The square root of 52656991 is about 7256.5136946057. The cubic root of 52656991 is about 374.8164814631.

The spelling of 52656991 in words is "fifty-two million, six hundred fifty-six thousand, nine hundred ninety-one".