4107991 has 2 divisors, whose sum is σ = 4107992. Its totient is φ = 4107990.

The previous prime is 4107979. The next prime is 4107997. The reversal of 4107991 is 1997014.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4107991 - 2⁹ = 4107479 is a prime.

4107991 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4107997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2053995 + 2053996.

It is an arithmetic number, because the mean of its divisors is an integer number (2053996).

Almost surely, 2^4107991 is an apocalyptic number.

4107991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4107991 is an equidigital number, since it uses as much as digits as its factorization.

4107991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 4107991 is about 2026.8179493975. The cubic root of 4107991 is about 160.1559807007.

The spelling of 4107991 in words is "four million, one hundred seven thousand, nine hundred ninety-one".