253671987 has 8 divisors (see below), whose sum is σ = 342304704. Its totient is φ = 167076968.

The previous prime is 253671941. The next prime is 253672009. The reversal of 253671987 is 789176352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253671987 - 2⁸ = 253671731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253671917) 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 7 ways as a sum of consecutive naturals, for example, 509133 + ... + 509630.

It is an arithmetic number, because the mean of its divisors is an integer number (42788088).

Almost surely, 2^253671987 is an apocalyptic number.

253671987 is a deficient number, since it is larger than the sum of its proper divisors (88632717).

253671987 is a wasteful number, since it uses less digits than its factorization.

253671987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018849.

The product of its digits is 635040, while the sum is 48.

The square root of 253671987 is about 15927.0834429911. The cubic root of 253671987 is about 633.0298222238.

The spelling of 253671987 in words is "two hundred fifty-three million, six hundred seventy-one thousand, nine hundred eighty-seven".