91945501 has 4 divisors (see below), whose sum is σ = 92759292. Its totient is φ = 91131712.

The previous prime is 91945499. The next prime is 91945519. The reversal of 91945501 is 10554919.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44542276 + 47403225 = 6674^2 + 6885^2 .

It is a cyclic number.

It is not a de Polignac number, because 91945501 - 2¹ = 91945499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91945531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406726 + ... + 406951.

It is an arithmetic number, because the mean of its divisors is an integer number (23189823).

Almost surely, 2^91945501 is an apocalyptic number.

It is an amenable number.

91945501 is a deficient number, since it is larger than the sum of its proper divisors (813791).

91945501 is a wasteful number, since it uses less digits than its factorization.

91945501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813790.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 91945501 is about 9588.8216690061. The cubic root of 91945501 is about 451.3465853725.

The spelling of 91945501 in words is "ninety-one million, nine hundred forty-five thousand, five hundred one".