9379991 has 2 divisors, whose sum is σ = 9379992. Its totient is φ = 9379990.

The previous prime is 9379973. The next prime is 9379999. The reversal of 9379991 is 1999739.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9379991 - 2¹⁸ = 9117847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9379999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4689995 + 4689996.

It is an arithmetic number, because the mean of its divisors is an integer number (4689996).

Almost surely, 2^9379991 is an apocalyptic number.

9379991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9379991 is an equidigital number, since it uses as much as digits as its factorization.

9379991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137781, while the sum is 47.

The square root of 9379991 is about 3062.6770969203. The cubic root of 9379991 is about 210.8955781088.

The spelling of 9379991 in words is "nine million, three hundred seventy-nine thousand, nine hundred ninety-one".