3481691021 has 2 divisors, whose sum is σ = 3481691022. Its totient is φ = 3481691020.

The previous prime is 3481690997. The next prime is 3481691023. The reversal of 3481691021 is 1201961843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1959832900 + 1521858121 = 44270^2 + 39011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3481691021 is a prime.

Together with 3481691023, 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 (3481691023) 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 as a sum of consecutive naturals, namely, 1740845510 + 1740845511.

It is an arithmetic number, because the mean of its divisors is an integer number (1740845511).

Almost surely, 2^3481691021 is an apocalyptic number.

It is an amenable number.

3481691021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3481691021 is an equidigital number, since it uses as much as digits as its factorization.

3481691021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 3481691021 is about 59005.8558195710. The cubic root of 3481691021 is about 1515.6423873024.

The spelling of 3481691021 in words is "three billion, four hundred eighty-one million, six hundred ninety-one thousand, twenty-one".