1281688853 has 2 divisors, whose sum is σ = 1281688854. Its totient is φ = 1281688852.

The previous prime is 1281688829. The next prime is 1281688861. The reversal of 1281688853 is 3588861821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1270352164 + 11336689 = 35642^2 + 3367^2 .

It is an emirp because it is prime and its reverse (3588861821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1281688853 - 2⁶ = 1281688789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281688153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640844426 + 640844427.

It is an arithmetic number, because the mean of its divisors is an integer number (640844427).

Almost surely, 2^1281688853 is an apocalyptic number.

It is an amenable number.

1281688853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281688853 is an equidigital number, since it uses as much as digits as its factorization.

1281688853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 737280, while the sum is 50.

The square root of 1281688853 is about 35800.6822979675. The cubic root of 1281688853 is about 1086.2443630580.

The spelling of 1281688853 in words is "one billion, two hundred eighty-one million, six hundred eighty-eight thousand, eight hundred fifty-three".