91220703 has 12 divisors (see below), whose sum is σ = 141485400. Its totient is φ = 52126032.

The previous prime is 91220699. The next prime is 91220707. The reversal of 91220703 is 30702219.

It is an interprime number because it is at equal distance from previous prime (91220699) and next prime (91220707).

It is not a de Polignac number, because 91220703 - 2² = 91220699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91220707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310128 + ... + 310421.

It is an arithmetic number, because the mean of its divisors is an integer number (11790450).

Almost surely, 2^91220703 is an apocalyptic number.

91220703 is a deficient number, since it is larger than the sum of its proper divisors (50264697).

91220703 is a wasteful number, since it uses less digits than its factorization.

91220703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620566 (or 620559 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 91220703 is about 9550.9529891001. The cubic root of 91220703 is about 450.1574806846.

The spelling of 91220703 in words is "ninety-one million, two hundred twenty thousand, seven hundred three".