123477298487 has 4 divisors (see below), whose sum is σ = 123519923856. Its totient is φ = 123434673120.

The previous prime is 123477298481. The next prime is 123477298489. The reversal of 123477298487 is 784892774321.

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 123477298487 - 2²⁸ = 123208863031 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 (123477298481) 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, 21308339 + ... + 21314132.

It is an arithmetic number, because the mean of its divisors is an integer number (30879980964).

Almost surely, 2^123477298487 is an apocalyptic number.

123477298487 is a deficient number, since it is larger than the sum of its proper divisors (42625369).

123477298487 is an equidigital number, since it uses as much as digits as its factorization.

123477298487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42625368.

The product of its digits is 37933056, while the sum is 62.

The spelling of 123477298487 in words is "one hundred twenty-three billion, four hundred seventy-seven million, two hundred ninety-eight thousand, four hundred eighty-seven".