91065628 has 6 divisors (see below), whose sum is σ = 159364856. Its totient is φ = 45532812.

The previous prime is 91065593. The next prime is 91065641. The reversal of 91065628 is 82656019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11383200 + ... + 11383207.

Almost surely, 2^91065628 is an apocalyptic number.

It is an amenable number.

91065628 is a deficient number, since it is larger than the sum of its proper divisors (68299228).

91065628 is a wasteful number, since it uses less digits than its factorization.

91065628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22766411 (or 22766409 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 91065628 is about 9542.8312360641. The cubic root of 91065628 is about 449.9022470796.

The spelling of 91065628 in words is "ninety-one million, sixty-five thousand, six hundred twenty-eight".