260987497 has 2 divisors, whose sum is σ = 260987498. Its totient is φ = 260987496.

The previous prime is 260987459. The next prime is 260987527. The reversal of 260987497 is 794789062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174794841 + 86192656 = 13221^2 + 9284^2 .

It is a cyclic number.

It is not a de Polignac number, because 260987497 - 2⁷ = 260987369 is a prime.

It is a super-3 number, since 3×260987497³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (260987197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130493748 + 130493749.

It is an arithmetic number, because the mean of its divisors is an integer number (130493749).

Almost surely, 2^260987497 is an apocalyptic number.

It is an amenable number.

260987497 is a deficient number, since it is larger than the sum of its proper divisors (1).

260987497 is an equidigital number, since it uses as much as digits as its factorization.

260987497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 260987497 is about 16155.1074586336. The cubic root of 260987497 is about 639.0574479990.

The spelling of 260987497 in words is "two hundred sixty million, nine hundred eighty-seven thousand, four hundred ninety-seven".