91248793 has 2 divisors, whose sum is σ = 91248794. Its totient is φ = 91248792.

The previous prime is 91248769. The next prime is 91248799. The reversal of 91248793 is 39784219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79709184 + 11539609 = 8928^2 + 3397^2 .

It is an emirp because it is prime and its reverse (39784219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91248793 - 2⁹ = 91248281 is a prime.

It is not a weakly prime, because it can be changed into another prime (91248799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45624396 + 45624397.

It is an arithmetic number, because the mean of its divisors is an integer number (45624397).

Almost surely, 2^91248793 is an apocalyptic number.

It is an amenable number.

91248793 is a deficient number, since it is larger than the sum of its proper divisors (1).

91248793 is an equidigital number, since it uses as much as digits as its factorization.

91248793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 91248793 is about 9552.4234097950. The cubic root of 91248793 is about 450.2036822795.

The spelling of 91248793 in words is "ninety-one million, two hundred forty-eight thousand, seven hundred ninety-three".