3540991 has 2 divisors, whose sum is σ = 3540992. Its totient is φ = 3540990.

The previous prime is 3540931. The next prime is 3541019. The reversal of 3540991 is 1990453.

It is a strong prime.

It is an emirp because it is prime and its reverse (1990453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3540991 - 2²¹ = 1443839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3540931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770495 + 1770496.

It is an arithmetic number, because the mean of its divisors is an integer number (1770496).

Almost surely, 2^3540991 is an apocalyptic number.

3540991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540991 is an equidigital number, since it uses as much as digits as its factorization.

3540991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 3540991 is about 1881.7521090728. The cubic root of 3540991 is about 152.4198772878.

The spelling of 3540991 in words is "three million, five hundred forty thousand, nine hundred ninety-one".