1208716081 has 4 divisors (see below), whose sum is σ = 1208790000. Its totient is φ = 1208642164.

The previous prime is 1208716063. The next prime is 1208716087. The reversal of 1208716081 is 1806178021.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1208716081 - 2⁹ = 1208715569 is a prime.

It is a super-2 number, since 2×1208716081² = 2921989128935997122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1208716087) 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, 331 + ... + 49168.

It is an arithmetic number, because the mean of its divisors is an integer number (302197500).

Almost surely, 2^1208716081 is an apocalyptic number.

It is an amenable number.

1208716081 is a deficient number, since it is larger than the sum of its proper divisors (73919).

1208716081 is an equidigital number, since it uses as much as digits as its factorization.

1208716081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73918.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 1208716081 is about 34766.5943255879. The cubic root of 1208716081 is about 1065.2252033912.

The spelling of 1208716081 in words is "one billion, two hundred eight million, seven hundred sixteen thousand, eighty-one".