91387929862 has 8 divisors (see below), whose sum is σ = 137187103536. Its totient is φ = 45658895352.

The previous prime is 91387929827. The next prime is 91387929863. The reversal of 91387929862 is 26892978319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 91387929794 and 91387929803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91387929863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17531533 + ... + 17536744.

It is an arithmetic number, because the mean of its divisors is an integer number (17148387942).

Almost surely, 2^91387929862 is an apocalyptic number.

91387929862 is a deficient number, since it is larger than the sum of its proper divisors (45799173674).

91387929862 is a wasteful number, since it uses less digits than its factorization.

91387929862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35069582.

The product of its digits is 23514624, while the sum is 64.

The spelling of 91387929862 in words is "ninety-one billion, three hundred eighty-seven million, nine hundred twenty-nine thousand, eight hundred sixty-two".