3487321 has 2 divisors, whose sum is σ = 3487322. Its totient is φ = 3487320.

The previous prime is 3487303. The next prime is 3487331. The reversal of 3487321 is 1237843.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 1413721 = 1440^2 + 1189^2 .

It is an emirp because it is prime and its reverse (1237843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3487321 - 2¹³ = 3479129 is a prime.

It is a super-2 number, since 2×3487321² = 24322815514082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3487321.

It is not a weakly prime, because it can be changed into another prime (3487301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1743660 + 1743661.

It is an arithmetic number, because the mean of its divisors is an integer number (1743661).

Almost surely, 2^3487321 is an apocalyptic number.

It is an amenable number.

3487321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3487321 is an equidigital number, since it uses as much as digits as its factorization.

3487321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 3487321 is about 1867.4370136634. The cubic root of 3487321 is about 151.6458890884.

The spelling of 3487321 in words is "three million, four hundred eighty-seven thousand, three hundred twenty-one".