91240023203 has 4 divisors (see below), whose sum is σ = 104274312240. Its totient is φ = 78205734168.

The previous prime is 91240023157. The next prime is 91240023223. The reversal of 91240023203 is 30232004219.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91240023203 - 2⁸ = 91240022947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91240023223) 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, 6517144508 + ... + 6517144521.

It is an arithmetic number, because the mean of its divisors is an integer number (26068578060).

Almost surely, 2^91240023203 is an apocalyptic number.

91240023203 is a deficient number, since it is larger than the sum of its proper divisors (13034289037).

91240023203 is a wasteful number, since it uses less digits than its factorization.

91240023203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13034289036.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 91240023203 in words is "ninety-one billion, two hundred forty million, twenty-three thousand, two hundred three".