260497639 has 2 divisors, whose sum is σ = 260497640. Its totient is φ = 260497638.

The previous prime is 260497637. The next prime is 260497661. The reversal of 260497639 is 936794062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260497639 - 2¹ = 260497637 is a prime.

Together with 260497637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260497637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130248819 + 130248820.

It is an arithmetic number, because the mean of its divisors is an integer number (130248820).

Almost surely, 2^260497639 is an apocalyptic number.

260497639 is a deficient number, since it is larger than the sum of its proper divisors (1).

260497639 is an equidigital number, since it uses as much as digits as its factorization.

260497639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 260497639 is about 16139.9392501955. The cubic root of 260497639 is about 638.6573733229.

The spelling of 260497639 in words is "two hundred sixty million, four hundred ninety-seven thousand, six hundred thirty-nine".