109212739491 has 8 divisors (see below), whose sum is σ = 146226263040. Its totient is φ = 72503854472.

The previous prime is 109212739483. The next prime is 109212739513. The reversal of 109212739491 is 194937212901.

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

It is a cyclic number.

It is not a de Polignac number, because 109212739491 - 2³ = 109212739483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109212739491.

It is not an unprimeable number, because it can be changed into a prime (109212739411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76158795 + ... + 76160228.

It is an arithmetic number, because the mean of its divisors is an integer number (18278282880).

Almost surely, 2^109212739491 is an apocalyptic number.

109212739491 is a deficient number, since it is larger than the sum of its proper divisors (37013523549).

109212739491 is a wasteful number, since it uses less digits than its factorization.

109212739491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152319265.

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 109212739491 in words is "one hundred nine billion, two hundred twelve million, seven hundred thirty-nine thousand, four hundred ninety-one".