4102991 has 2 divisors, whose sum is σ = 4102992. Its totient is φ = 4102990.

The previous prime is 4102979. The next prime is 4102997. The reversal of 4102991 is 1992014.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4102991 - 2⁶ = 4102927 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4102991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4102997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051495 + 2051496.

It is an arithmetic number, because the mean of its divisors is an integer number (2051496).

Almost surely, 2^4102991 is an apocalyptic number.

4102991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4102991 is an equidigital number, since it uses as much as digits as its factorization.

4102991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4102991 is about 2025.5841132868. The cubic root of 4102991 is about 160.0909769060.

The spelling of 4102991 in words is "four million, one hundred two thousand, nine hundred ninety-one".