53439487 has 2 divisors, whose sum is σ = 53439488. Its totient is φ = 53439486.

The previous prime is 53439473. The next prime is 53439509. The reversal of 53439487 is 78493435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53439487 - 2¹⁹ = 52915199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53439437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26719743 + 26719744.

It is an arithmetic number, because the mean of its divisors is an integer number (26719744).

Almost surely, 2^53439487 is an apocalyptic number.

53439487 is a deficient number, since it is larger than the sum of its proper divisors (1).

53439487 is an equidigital number, since it uses as much as digits as its factorization.

53439487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The square root of 53439487 is about 7310.2316652757. The cubic root of 53439487 is about 376.6639821077.

The spelling of 53439487 in words is "fifty-three million, four hundred thirty-nine thousand, four hundred eighty-seven".