3285991 has 2 divisors, whose sum is σ = 3285992. Its totient is φ = 3285990.

The previous prime is 3285983. The next prime is 3286013. The reversal of 3285991 is 1995823.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3285991 - 2³ = 3285983 is a prime.

3285991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3285991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3285901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1642995 + 1642996.

It is an arithmetic number, because the mean of its divisors is an integer number (1642996).

Almost surely, 2^3285991 is an apocalyptic number.

3285991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3285991 is an equidigital number, since it uses as much as digits as its factorization.

3285991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 3285991 is about 1812.7302612358. The cubic root of 3285991 is about 148.6695829717.

The spelling of 3285991 in words is "three million, two hundred eighty-five thousand, nine hundred ninety-one".