2134780123 has 4 divisors (see below), whose sum is σ = 2439748720. Its totient is φ = 1829811528.

The previous prime is 2134780097. The next prime is 2134780133. The reversal of 2134780123 is 3210874312.

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 2134780123 - 2²⁵ = 2101225691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2134780133) 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, 152484288 + ... + 152484301.

It is an arithmetic number, because the mean of its divisors is an integer number (609937180).

Almost surely, 2^2134780123 is an apocalyptic number.

2134780123 is a deficient number, since it is larger than the sum of its proper divisors (304968597).

2134780123 is an equidigital number, since it uses as much as digits as its factorization.

2134780123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304968596.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2134780123 is about 46203.6808382189. The cubic root of 2134780123 is about 1287.6101262259.

The spelling of 2134780123 in words is "two billion, one hundred thirty-four million, seven hundred eighty thousand, one hundred twenty-three".