91045709 has 4 divisors (see below), whose sum is σ = 91242816. Its totient is φ = 90848604.

The previous prime is 91045699. The next prime is 91045711. The reversal of 91045709 is 90754019.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91045709 - 2¹⁶ = 90980173 is a prime.

It is a super-2 number, since 2×91045709² = 16578642254625362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91045609) 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, 97859 + ... + 98784.

It is an arithmetic number, because the mean of its divisors is an integer number (22810704).

Almost surely, 2^91045709 is an apocalyptic number.

It is an amenable number.

91045709 is a deficient number, since it is larger than the sum of its proper divisors (197107).

91045709 is a wasteful number, since it uses less digits than its factorization.

91045709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197106.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 91045709 is about 9541.7875159741. The cubic root of 91045709 is about 449.8694419604.

The spelling of 91045709 in words is "ninety-one million, forty-five thousand, seven hundred nine".