91919494 has 8 divisors (see below), whose sum is σ = 139244688. Its totient is φ = 45504600.

The previous prime is 91919479. The next prime is 91919501. The reversal of 91919494 is 49491919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227322 + ... + 227725.

It is an arithmetic number, because the mean of its divisors is an integer number (17405586).

Almost surely, 2^91919494 is an apocalyptic number.

91919494 is a deficient number, since it is larger than the sum of its proper divisors (47325194).

91919494 is a wasteful number, since it uses less digits than its factorization.

91919494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455150.

The product of its digits is 104976, while the sum is 46.

The square root of 91919494 is about 9587.4654627800. The cubic root of 91919494 is about 451.3040265472.

The spelling of 91919494 in words is "ninety-one million, nine hundred nineteen thousand, four hundred ninety-four".