5205129994 has 4 divisors (see below), whose sum is σ = 7807694994. Its totient is φ = 2602564996.

The previous prime is 5205129973. The next prime is 5205130079. The reversal of 5205129994 is 4999215025.

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., 5189329369 + 15800625 = 72037^2 + 3975^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1301282497 + ... + 1301282500.

Almost surely, 2^5205129994 is an apocalyptic number.

5205129994 is a deficient number, since it is larger than the sum of its proper divisors (2602565000).

5205129994 is a wasteful number, since it uses less digits than its factorization.

5205129994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602564999.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 5205129994 is about 72146.5868492751. The cubic root of 5205129994 is about 1733.0477415649.

The spelling of 5205129994 in words is "five billion, two hundred five million, one hundred twenty-nine thousand, nine hundred ninety-four".