91247048 has 16 divisors (see below), whose sum is σ = 172603980. Its totient is φ = 45219328.

The previous prime is 91247047. The next prime is 91247053. The reversal of 91247048 is 84074219.

It can be written as a sum of positive squares in 2 ways, for example, as 66227044 + 25020004 = 8138^2 + 5002^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91246999 and 91247017.

It is not an unprimeable number, because it can be changed into a prime (91247047) 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 in 3 ways as a sum of consecutive naturals, for example, 49565 + ... + 51372.

Almost surely, 2^91247048 is an apocalyptic number.

It is an amenable number.

91247048 is a deficient number, since it is larger than the sum of its proper divisors (81356932).

91247048 is a wasteful number, since it uses less digits than its factorization.

91247048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101056 (or 101052 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 91247048 is about 9552.3320712798. The cubic root of 91247048 is about 450.2008124318.

The spelling of 91247048 in words is "ninety-one million, two hundred forty-seven thousand, forty-eight".