1206994539 has 4 divisors (see below), whose sum is σ = 1609326056. Its totient is φ = 804663024.

The previous prime is 1206994519. The next prime is 1206994553. The reversal of 1206994539 is 9354996021.

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

It is not a de Polignac number, because 1206994539 - 2¹¹ = 1206992491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206994519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201165754 + ... + 201165759.

It is an arithmetic number, because the mean of its divisors is an integer number (402331514).

Almost surely, 2^1206994539 is an apocalyptic number.

1206994539 is a deficient number, since it is larger than the sum of its proper divisors (402331517).

1206994539 is an equidigital number, since it uses as much as digits as its factorization.

1206994539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402331516.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 1206994539 is about 34741.8269381447. The cubic root of 1206994539 is about 1064.7192391783.

The spelling of 1206994539 in words is "one billion, two hundred six million, nine hundred ninety-four thousand, five hundred thirty-nine".