253613587 has 4 divisors (see below), whose sum is σ = 253653400. Its totient is φ = 253573776.

The previous prime is 253613567. The next prime is 253613597. The reversal of 253613587 is 785316352.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(253613587) divides (253613587-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 253613587 - 2¹¹ = 253611539 is a prime.

It is a super-2 number, since 2×253613587² = 128639703022013138, which contains 22 as substring.

It is a deceptive number, since it divides R_253613586.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253613567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7962 + ... + 23887.

It is an arithmetic number, because the mean of its divisors is an integer number (63413350).

Almost surely, 2^253613587 is an apocalyptic number.

253613587 is the 7963-rd decagonal number.

253613587 is a deficient number, since it is larger than the sum of its proper divisors (39813).

253613587 is an equidigital number, since it uses as much as digits as its factorization.

253613587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39812.

The product of its digits is 151200, while the sum is 40.

The square root of 253613587 is about 15925.2499823394. The cubic root of 253613587 is about 632.9812400903.

The spelling of 253613587 in words is "two hundred fifty-three million, six hundred thirteen thousand, five hundred eighty-seven".