1208660072891 has 2 divisors, whose sum is σ = 1208660072892. Its totient is φ = 1208660072890.

The previous prime is 1208660072839. The next prime is 1208660072903. The reversal of 1208660072891 is 1982700668021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1208660072891 - 2³⁴ = 1191480203707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1208660072591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604330036445 + 604330036446.

It is an arithmetic number, because the mean of its divisors is an integer number (604330036446).

Almost surely, 2^{1208660072891} is an apocalyptic number.

1208660072891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208660072891 is an equidigital number, since it uses as much as digits as its factorization.

1208660072891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 1208660072891 in words is "one trillion, two hundred eight billion, six hundred sixty million, seventy-two thousand, eight hundred ninety-one".