253705487 has 24 divisors (see below), whose sum is σ = 302929920. Its totient is φ = 211785840.

The previous prime is 253705469. The next prime is 253705489. The reversal of 253705487 is 784507352.

It is not a de Polignac number, because 253705487 - 2¹² = 253701391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253705489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366812 + ... + 367502.

It is an arithmetic number, because the mean of its divisors is an integer number (12622080).

Almost surely, 2^253705487 is an apocalyptic number.

253705487 is a deficient number, since it is larger than the sum of its proper divisors (49224433).

253705487 is a wasteful number, since it uses less digits than its factorization.

253705487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 41.

The square root of 253705487 is about 15928.1350760219. The cubic root of 253705487 is about 633.0576870344.

The spelling of 253705487 in words is "two hundred fifty-three million, seven hundred five thousand, four hundred eighty-seven".