91048279 has 4 divisors (see below), whose sum is σ = 104055184. Its totient is φ = 78041376.

The previous prime is 91048267. The next prime is 91048291. The reversal of 91048279 is 97284019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97284019 = 7 ⋅13897717.

It is an interprime number because it is at equal distance from previous prime (91048267) and next prime (91048291).

It is not a de Polignac number, because 91048279 - 2¹⁹ = 90523991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91048219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503442 + ... + 6503455.

It is an arithmetic number, because the mean of its divisors is an integer number (26013796).

Almost surely, 2^91048279 is an apocalyptic number.

91048279 is a deficient number, since it is larger than the sum of its proper divisors (13006905).

91048279 is a wasteful number, since it uses less digits than its factorization.

91048279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006904.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 91048279 is about 9541.9221858072. The cubic root of 91048279 is about 449.8736748291.

The spelling of 91048279 in words is "ninety-one million, forty-eight thousand, two hundred seventy-nine".