91445765 has 8 divisors (see below), whose sum is σ = 115510560. Its totient is φ = 69306192.

The previous prime is 91445707. The next prime is 91445773. The reversal of 91445765 is 56754419.

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

It is a cyclic number.

It is not a de Polignac number, because 91445765 - 2¹⁸ = 91183621 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 481199 + ... + 481388.

It is an arithmetic number, because the mean of its divisors is an integer number (14438820).

Almost surely, 2^91445765 is an apocalyptic number.

91445765 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91445765 is a deficient number, since it is larger than the sum of its proper divisors (24064795).

91445765 is a wasteful number, since it uses less digits than its factorization.

91445765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962611.

The product of its digits is 151200, while the sum is 41.

The square root of 91445765 is about 9562.7279057809. The cubic root of 91445765 is about 450.5273898999.

The spelling of 91445765 in words is "ninety-one million, four hundred forty-five thousand, seven hundred sixty-five".