1320018871 has 2 divisors, whose sum is σ = 1320018872. Its totient is φ = 1320018870.

The previous prime is 1320018811. The next prime is 1320018881. The reversal of 1320018871 is 1788100231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320018871 is a prime.

It is a super-2 number, since 2×1320018871² = 3484899639592229282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320018811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660009435 + 660009436.

It is an arithmetic number, because the mean of its divisors is an integer number (660009436).

Almost surely, 2^1320018871 is an apocalyptic number.

1320018871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320018871 is an equidigital number, since it uses as much as digits as its factorization.

1320018871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1320018871 is about 36332.0639518319. The cubic root of 1320018871 is about 1096.9665379255.

The spelling of 1320018871 in words is "one billion, three hundred twenty million, eighteen thousand, eight hundred seventy-one".