3487231827721 has 2 divisors, whose sum is σ = 3487231827722. Its totient is φ = 3487231827720.

The previous prime is 3487231827719. The next prime is 3487231827763. The reversal of 3487231827721 is 1277281327843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3219566319225 + 267665508496 = 1794315^2 + 517364^2 .

It is a cyclic number.

It is not a de Polignac number, because 3487231827721 - 2¹ = 3487231827719 is a prime.

Together with 3487231827719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3487231827791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1743615913860 + 1743615913861.

It is an arithmetic number, because the mean of its divisors is an integer number (1743615913861).

Almost surely, 2^{3487231827721} is an apocalyptic number.

It is an amenable number.

3487231827721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3487231827721 is an equidigital number, since it uses as much as digits as its factorization.

3487231827721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 55.

The spelling of 3487231827721 in words is "three trillion, four hundred eighty-seven billion, two hundred thirty-one million, eight hundred twenty-seven thousand, seven hundred twenty-one".