2123478887 has 8 divisors (see below), whose sum is σ = 2218323456. Its totient is φ = 2028844312.

The previous prime is 2123478883. The next prime is 2123478899. The reversal of 2123478887 is 7888743212.

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 2123478887 - 2² = 2123478883 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 (2123478883) 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, 31643 + ... + 72444.

It is an arithmetic number, because the mean of its divisors is an integer number (277290432).

Almost surely, 2^2123478887 is an apocalyptic number.

2123478887 is a deficient number, since it is larger than the sum of its proper divisors (94844569).

2123478887 is a wasteful number, since it uses less digits than its factorization.

2123478887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104997.

The product of its digits is 1204224, while the sum is 50.

The square root of 2123478887 is about 46081.2205459013. The cubic root of 2123478887 is about 1285.3339605477. Note that the first 3 decimals are identical.

The spelling of 2123478887 in words is "two billion, one hundred twenty-three million, four hundred seventy-eight thousand, eight hundred eighty-seven".