2129634938 has 4 divisors (see below), whose sum is σ = 3194452410. Its totient is φ = 1064817468.

The previous prime is 2129634919. The next prime is 2129634943. The reversal of 2129634938 is 8394369212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1321540609 + 808094329 = 36353^2 + 28427^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2129634892 and 2129634901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532408733 + ... + 532408736.

Almost surely, 2^2129634938 is an apocalyptic number.

2129634938 is a deficient number, since it is larger than the sum of its proper divisors (1064817472).

2129634938 is a wasteful number, since it uses less digits than its factorization.

2129634938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064817471.

The product of its digits is 559872, while the sum is 47.

The square root of 2129634938 is about 46147.9678642516. The cubic root of 2129634938 is about 1286.5748405418.

The spelling of 2129634938 in words is "two billion, one hundred twenty-nine million, six hundred thirty-four thousand, nine hundred thirty-eight".