1283531279 has 2 divisors, whose sum is σ = 1283531280. Its totient is φ = 1283531278.

The previous prime is 1283531237. The next prime is 1283531311. The reversal of 1283531279 is 9721353821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283531279 is a prime.

It is a super-3 number, since 3×1283531279³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283537279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641765639 + 641765640.

It is an arithmetic number, because the mean of its divisors is an integer number (641765640).

Almost surely, 2^1283531279 is an apocalyptic number.

1283531279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283531279 is an equidigital number, since it uses as much as digits as its factorization.

1283531279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 1283531279 is about 35826.4047735745. The cubic root of 1283531279 is about 1086.7646054580.

The spelling of 1283531279 in words is "one billion, two hundred eighty-three million, five hundred thirty-one thousand, two hundred seventy-nine".