4069991 has 2 divisors, whose sum is σ = 4069992. Its totient is φ = 4069990.

The previous prime is 4069937. The next prime is 4070051. The reversal of 4069991 is 1999604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4069991 - 2¹⁴ = 4053607 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₂₈₇₇₈₆ and since 4069991 and 287786 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4062991) 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, 2034995 + 2034996.

It is an arithmetic number, because the mean of its divisors is an integer number (2034996).

Almost surely, 2^4069991 is an apocalyptic number.

4069991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4069991 is an equidigital number, since it uses as much as digits as its factorization.

4069991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 4069991 is about 2017.4218696148. The cubic root of 4069991 is about 159.6606217950.

The spelling of 4069991 in words is "four million, sixty-nine thousand, nine hundred ninety-one".