260957987 has 4 divisors (see below), whose sum is σ = 260994360. Its totient is φ = 260921616.

The previous prime is 260957981. The next prime is 260957999. The reversal of 260957987 is 789759062.

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

It is a cyclic number.

It is not a de Polignac number, because 260957987 - 2⁴ = 260957971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260957981) 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 3 ways as a sum of consecutive naturals, for example, 3437 + ... + 23102.

It is an arithmetic number, because the mean of its divisors is an integer number (65248590).

Almost surely, 2^260957987 is an apocalyptic number.

260957987 is a deficient number, since it is larger than the sum of its proper divisors (36373).

260957987 is an equidigital number, since it uses as much as digits as its factorization.

260957987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36372.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 260957987 is about 16154.1940993663. The cubic root of 260957987 is about 639.0333608986.

The spelling of 260957987 in words is "two hundred sixty million, nine hundred fifty-seven thousand, nine hundred eighty-seven".