253646487 has 12 divisors (see below), whose sum is σ = 372588840. Its totient is φ = 166231248.

The previous prime is 253646473. The next prime is 253646513. The reversal of 253646487 is 784646352.

It is not a de Polignac number, because 253646487 - 2¹¹ = 253644439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253646417) 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 in 11 ways as a sum of consecutive naturals, for example, 238308 + ... + 239369.

It is an arithmetic number, because the mean of its divisors is an integer number (31049070).

Almost surely, 2^253646487 is an apocalyptic number.

253646487 is a deficient number, since it is larger than the sum of its proper divisors (118942353).

253646487 is a wasteful number, since it uses less digits than its factorization.

253646487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477742 (or 477739 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 253646487 is about 15926.2828996599. The cubic root of 253646487 is about 633.0086100519.

The spelling of 253646487 in words is "two hundred fifty-three million, six hundred forty-six thousand, four hundred eighty-seven".