91348945 has 16 divisors (see below), whose sum is σ = 112825872. Its totient is φ = 70969600.

The previous prime is 91348931. The next prime is 91348969. The reversal of 91348945 is 54984319.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 29899024 + 61449921 = 5468^2 + 7839^2 .

It is not a de Polignac number, because 91348945 - 2⁵ = 91348913 is a prime.

It is a super-2 number, since 2×91348945² = 16689259505226050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25059 + ... + 28471.

It is an arithmetic number, because the mean of its divisors is an integer number (7051617).

Almost surely, 2^91348945 is an apocalyptic number.

It is an amenable number.

91348945 is a deficient number, since it is larger than the sum of its proper divisors (21476927).

91348945 is a wasteful number, since it uses less digits than its factorization.

91348945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572.

The product of its digits is 155520, while the sum is 43.

The square root of 91348945 is about 9557.6642020946. The cubic root of 91348945 is about 450.3683321768.

The spelling of 91348945 in words is "ninety-one million, three hundred forty-eight thousand, nine hundred forty-five".