4959991 has 2 divisors, whose sum is σ = 4959992. Its totient is φ = 4959990.

The previous prime is 4959959. The next prime is 4960001. The reversal of 4959991 is 1999594.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4959991 - 2⁵ = 4959959 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4950991) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2479995 + 2479996.

It is an arithmetic number, because the mean of its divisors is an integer number (2479996).

Almost surely, 2^4959991 is an apocalyptic number.

4959991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4959991 is an equidigital number, since it uses as much as digits as its factorization.

4959991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 46.

The square root of 4959991 is about 2227.1037245714. The cubic root of 4959991 is about 170.5402765161.

The spelling of 4959991 in words is "four million, nine hundred fifty-nine thousand, nine hundred ninety-one".