5209690729 has 4 divisors (see below), whose sum is σ = 5210597376. Its totient is φ = 5208784084.

The previous prime is 5209690727. The next prime is 5209690753. The reversal of 5209690729 is 9270969025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5209690729 - 2¹ = 5209690727 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5209690727) 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, 444649 + ... + 456214.

It is an arithmetic number, because the mean of its divisors is an integer number (1302649344).

Almost surely, 2^5209690729 is an apocalyptic number.

It is an amenable number.

5209690729 is a deficient number, since it is larger than the sum of its proper divisors (906647).

5209690729 is an equidigital number, since it uses as much as digits as its factorization.

5209690729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906646.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 5209690729 is about 72178.1873490877. The cubic root of 5209690729 is about 1733.5537592908.

The spelling of 5209690729 in words is "five billion, two hundred nine million, six hundred ninety thousand, seven hundred twenty-nine".