3951559 has 2 divisors, whose sum is σ = 3951560. Its totient is φ = 3951558.

The previous prime is 3951557. The next prime is 3951587. The reversal of 3951559 is 9551593.

It is a weak prime.

It is an emirp because it is prime and its reverse (9551593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3951559 - 2¹ = 3951557 is a prime.

It is a super-2 number, since 2×3951559² = 31229637060962, which contains 22 as substring.

Together with 3951557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3951551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975779 + 1975780.

It is an arithmetic number, because the mean of its divisors is an integer number (1975780).

Almost surely, 2^3951559 is an apocalyptic number.

3951559 is a deficient number, since it is larger than the sum of its proper divisors (1).

3951559 is an equidigital number, since it uses as much as digits as its factorization.

3951559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30375, while the sum is 37.

The square root of 3951559 is about 1987.8528617581. The cubic root of 3951559 is about 158.0967068065.

The spelling of 3951559 in words is "three million, nine hundred fifty-one thousand, five hundred fifty-nine".