53487997 has 2 divisors, whose sum is σ = 53487998. Its totient is φ = 53487996.

The previous prime is 53487991. The next prime is 53488073. The reversal of 53487997 is 79978435.

53487997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52838361 + 649636 = 7269^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 53487997 - 2¹⁹ = 52963709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53487991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26743998 + 26743999.

It is an arithmetic number, because the mean of its divisors is an integer number (26743999).

Almost surely, 2^53487997 is an apocalyptic number.

It is an amenable number.

53487997 is a deficient number, since it is larger than the sum of its proper divisors (1).

53487997 is an equidigital number, since it uses as much as digits as its factorization.

53487997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 53487997 is about 7313.5488649492. The cubic root of 53487997 is about 376.7779206000. Note that the first 3 decimals are identical.

The spelling of 53487997 in words is "fifty-three million, four hundred eighty-seven thousand, nine hundred ninety-seven".