91013045 has 4 divisors (see below), whose sum is σ = 109215660. Its totient is φ = 72810432.

The previous prime is 91013003. The next prime is 91013077. The reversal of 91013045 is 54031019.

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 34597924 + 56415121 = 5882^2 + 7511^2 .

It is a cyclic number.

It is not a de Polignac number, because 91013045 - 2¹⁸ = 90750901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91013045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9101300 + ... + 9101309.

It is an arithmetic number, because the mean of its divisors is an integer number (27303915).

Almost surely, 2^91013045 is an apocalyptic number.

It is an amenable number.

91013045 is a deficient number, since it is larger than the sum of its proper divisors (18202615).

91013045 is a wasteful number, since it uses less digits than its factorization.

91013045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202614.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 91013045 is about 9540.0757334520. The cubic root of 91013045 is about 449.8156364113.

The spelling of 91013045 in words is "ninety-one million, thirteen thousand, forty-five".