105397491723 has 4 divisors (see below), whose sum is σ = 140529988968. Its totient is φ = 70264994480.

The previous prime is 105397491721. The next prime is 105397491751. The reversal of 105397491723 is 327194793501.

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 105397491723 - 2¹ = 105397491721 is a prime.

It is a super-2 number, since 2×105397491723² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105397491721) 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, 17566248618 + ... + 17566248623.

It is an arithmetic number, because the mean of its divisors is an integer number (35132497242).

Almost surely, 2^105397491723 is an apocalyptic number.

105397491723 is a deficient number, since it is larger than the sum of its proper divisors (35132497245).

105397491723 is an equidigital number, since it uses as much as digits as its factorization.

105397491723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35132497244.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 105397491723 in words is "one hundred five billion, three hundred ninety-seven million, four hundred ninety-one thousand, seven hundred twenty-three".