3487850921 has 2 divisors, whose sum is σ = 3487850922. Its totient is φ = 3487850920.

The previous prime is 3487850897. The next prime is 3487850941. The reversal of 3487850921 is 1290587843.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3185473600 + 302377321 = 56440^2 + 17389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3487850921 is a prime.

It is not a weakly prime, because it can be changed into another prime (3487850941) 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, 1743925460 + 1743925461.

It is an arithmetic number, because the mean of its divisors is an integer number (1743925461).

Almost surely, 2^3487850921 is an apocalyptic number.

It is an amenable number.

3487850921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3487850921 is an equidigital number, since it uses as much as digits as its factorization.

3487850921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 3487850921 is about 59058.0301144561. The cubic root of 3487850921 is about 1516.5356989084.

The spelling of 3487850921 in words is "three billion, four hundred eighty-seven million, eight hundred fifty thousand, nine hundred twenty-one".