91430145 has 48 divisors (see below), whose sum is σ = 164857680. Its totient is φ = 46835712.

The previous prime is 91430137. The next prime is 91430153. The reversal of 91430145 is 54103419.

91430145 is a `hidden beast` number, since 91 + 430 + 145 = 666.

It is an interprime number because it is at equal distance from previous prime (91430137) and next prime (91430153).

It can be written as a sum of positive squares in 8 ways, for example, as 8856576 + 82573569 = 2976^2 + 9087^2 .

It is not a de Polignac number, because 91430145 - 2³ = 91430137 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147877 + ... + 148493.

It is an arithmetic number, because the mean of its divisors is an integer number (3434535).

Almost surely, 2^91430145 is an apocalyptic number.

It is an amenable number.

91430145 is a deficient number, since it is larger than the sum of its proper divisors (73427535).

91430145 is a wasteful number, since it uses less digits than its factorization.

91430145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 91430145 is about 9561.9111583407. The cubic root of 91430145 is about 450.5017366669.

The spelling of 91430145 in words is "ninety-one million, four hundred thirty thousand, one hundred forty-five".