135247274623 has 4 divisors (see below), whose sum is σ = 135267051568. Its totient is φ = 135227497680.

The previous prime is 135247274621. The next prime is 135247274699. The reversal of 135247274623 is 326472742531.

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 135247274623 - 2¹ = 135247274621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135247274621) 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, 9878211 + ... + 9891892.

It is an arithmetic number, because the mean of its divisors is an integer number (33816762892).

Almost surely, 2^135247274623 is an apocalyptic number.

135247274623 is a deficient number, since it is larger than the sum of its proper divisors (19776945).

135247274623 is an equidigital number, since it uses as much as digits as its factorization.

135247274623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19776944.

The product of its digits is 1693440, while the sum is 46.

The spelling of 135247274623 in words is "one hundred thirty-five billion, two hundred forty-seven million, two hundred seventy-four thousand, six hundred twenty-three".