91244949 has 4 divisors (see below), whose sum is σ = 121659936. Its totient is φ = 60829964.

The previous prime is 91244947. The next prime is 91244953. The reversal of 91244949 is 94944219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91244949 - 2¹ = 91244947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91244949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91244941) 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, 15207489 + ... + 15207494.

It is an arithmetic number, because the mean of its divisors is an integer number (30414984).

Almost surely, 2^91244949 is an apocalyptic number.

It is an amenable number.

91244949 is a deficient number, since it is larger than the sum of its proper divisors (30414987).

91244949 is a wasteful number, since it uses less digits than its factorization.

91244949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30414986.

The product of its digits is 93312, while the sum is 42.

The square root of 91244949 is about 9552.2222021894. Note that the first 4 decimals coincide. The cubic root of 91244949 is about 450.1973603429.

The spelling of 91244949 in words is "ninety-one million, two hundred forty-four thousand, nine hundred forty-nine".