3487391 has 2 divisors, whose sum is σ = 3487392. Its totient is φ = 3487390.

The previous prime is 3487387. The next prime is 3487403. The reversal of 3487391 is 1937843.

It is a weak prime.

It is an emirp because it is prime and its reverse (1937843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3487391 - 2² = 3487387 is a prime.

It is a congruent number.

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, 1743695 + 1743696.

It is an arithmetic number, because the mean of its divisors is an integer number (1743696).

Almost surely, 2^3487391 is an apocalyptic number.

3487391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3487391 is an equidigital number, since it uses as much as digits as its factorization.

3487391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 3487391 is about 1867.4557558347. The cubic root of 3487391 is about 151.6469037298.

The spelling of 3487391 in words is "three million, four hundred eighty-seven thousand, three hundred ninety-one".