91919948 has 24 divisors (see below), whose sum is σ = 169989120. Its totient is φ = 43370640.

The previous prime is 91919941. The next prime is 91919959. The reversal of 91919948 is 84991919.

It is a junction number, because it is equal to n+sod(n) for n = 91919896 and 91919905.

It is not an unprimeable number, because it can be changed into a prime (91919941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18365 + ... + 22827.

It is an arithmetic number, because the mean of its divisors is an integer number (7082880).

Almost surely, 2^91919948 is an apocalyptic number.

It is an amenable number.

91919948 is a deficient number, since it is larger than the sum of its proper divisors (78069172).

91919948 is a wasteful number, since it uses less digits than its factorization.

91919948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757 (or 4755 counting only the distinct ones).

The product of its digits is 209952, while the sum is 50.

The square root of 91919948 is about 9587.4891394984. The cubic root of 91919948 is about 451.3047695586.

The spelling of 91919948 in words is "ninety-one million, nine hundred nineteen thousand, nine hundred forty-eight".