10069991 has 2 divisors, whose sum is σ = 10069992. Its totient is φ = 10069990.

The previous prime is 10069987. The next prime is 10069993. The reversal of 10069991 is 19996001.

It is a strong prime.

It is an emirp because it is prime and its reverse (19996001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10069991 - 2² = 10069987 is a prime.

It is a Sophie Germain prime.

Together with 10069993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10069993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5034995 + 5034996.

It is an arithmetic number, because the mean of its divisors is an integer number (5034996).

Almost surely, 2^10069991 is an apocalyptic number.

10069991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10069991 is an equidigital number, since it uses as much as digits as its factorization.

10069991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 10069991 is about 3173.3249124538. The cubic root of 10069991 is about 215.9449376680.

The spelling of 10069991 in words is "ten million, sixty-nine thousand, nine hundred ninety-one".