1316143643 has 2 divisors, whose sum is σ = 1316143644. Its totient is φ = 1316143642.

The previous prime is 1316143639. The next prime is 1316143681. The reversal of 1316143643 is 3463416131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1316143643 - 2² = 1316143639 is a prime.

It is a super-2 number, since 2×1316143643² = 3464468178018622898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1316142643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658071821 + 658071822.

It is an arithmetic number, because the mean of its divisors is an integer number (658071822).

Almost surely, 2^1316143643 is an apocalyptic number.

1316143643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316143643 is an equidigital number, since it uses as much as digits as its factorization.

1316143643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 1316143643 is about 36278.6940641473. The cubic root of 1316143643 is about 1095.8920173842.

Adding to 1316143643 its reverse (3463416131), we get a palindrome (4779559774).

The spelling of 1316143643 in words is "one billion, three hundred sixteen million, one hundred forty-three thousand, six hundred forty-three".