3261129887 has 2 divisors, whose sum is σ = 3261129888. Its totient is φ = 3261129886.

The previous prime is 3261129869. The next prime is 3261129889. The reversal of 3261129887 is 7889211623.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3261129887 - 2¹⁴ = 3261113503 is a prime.

Together with 3261129889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261129889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630564943 + 1630564944.

It is an arithmetic number, because the mean of its divisors is an integer number (1630564944).

Almost surely, 2^3261129887 is an apocalyptic number.

3261129887 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261129887 is an equidigital number, since it uses as much as digits as its factorization.

3261129887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 3261129887 is about 57106.3033911319. The cubic root of 3261129887 is about 1482.9369921124.

The spelling of 3261129887 in words is "three billion, two hundred sixty-one million, one hundred twenty-nine thousand, eight hundred eighty-seven".