91068642 has 48 divisors (see below), whose sum is σ = 233288640. Its totient is φ = 25121376.

The previous prime is 91068641. The next prime is 91068673. The reversal of 91068642 is 24686019.

91068642 is a `hidden beast` number, since 9 + 1 + 0 + 6 + 8 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 91068597 and 91068606.

It is not an unprimeable number, because it can be changed into a prime (91068641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8808 + ... + 16115.

It is an arithmetic number, because the mean of its divisors is an integer number (4860180).

Almost surely, 2^91068642 is an apocalyptic number.

91068642 is an abundant number, since it is smaller than the sum of its proper divisors (142219998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91068642 is a wasteful number, since it uses less digits than its factorization.

91068642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24967 (or 24964 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 91068642 is about 9542.9891543478. The cubic root of 91068642 is about 449.9072104979.

The spelling of 91068642 in words is "ninety-one million, sixty-eight thousand, six hundred forty-two".