91454939 has 2 divisors, whose sum is σ = 91454940. Its totient is φ = 91454938.

The previous prime is 91454927. The next prime is 91454947. The reversal of 91454939 is 93945419.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (93945419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91454939 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91454939.

It is not a weakly prime, because it can be changed into another prime (91454989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45727469 + 45727470.

It is an arithmetic number, because the mean of its divisors is an integer number (45727470).

Almost surely, 2^91454939 is an apocalyptic number.

91454939 is a deficient number, since it is larger than the sum of its proper divisors (1).

91454939 is an equidigital number, since it uses as much as digits as its factorization.

91454939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 91454939 is about 9563.2075685933. The cubic root of 91454939 is about 450.5424552962.

The spelling of 91454939 in words is "ninety-one million, four hundred fifty-four thousand, nine hundred thirty-nine".