91300138239 has 16 divisors (see below), whose sum is σ = 128931804000. Its totient is φ = 57269698560.

The previous prime is 91300138217. The next prime is 91300138261. The reversal of 91300138239 is 93283100319.

It is an interprime number because it is at equal distance from previous prime (91300138217) and next prime (91300138261).

It is not a de Polignac number, because 91300138239 - 2⁹ = 91300137727 is a prime.

It is a super-2 number, since 2×91300138239² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91300138197 and 91300138206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91300158239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82114 + ... + 435135.

It is an arithmetic number, because the mean of its divisors is an integer number (8058237750).

Almost surely, 2^91300138239 is an apocalyptic number.

91300138239 is a deficient number, since it is larger than the sum of its proper divisors (37631665761).

91300138239 is a wasteful number, since it uses less digits than its factorization.

91300138239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520730.

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 91300138239 in words is "ninety-one billion, three hundred million, one hundred thirty-eight thousand, two hundred thirty-nine".