1283234639 has 2 divisors, whose sum is σ = 1283234640. Its totient is φ = 1283234638.

The previous prime is 1283234621. The next prime is 1283234651. The reversal of 1283234639 is 9364323821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283234639 is a prime.

It is a super-2 number, since 2×1283234639² = 3293382277458920642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1283234596 and 1283234605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283234609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641617319 + 641617320.

It is an arithmetic number, because the mean of its divisors is an integer number (641617320).

Almost surely, 2^1283234639 is an apocalyptic number.

1283234639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283234639 is an equidigital number, since it uses as much as digits as its factorization.

1283234639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 1283234639 is about 35822.2645710737. The cubic root of 1283234639 is about 1086.6808774138.

The spelling of 1283234639 in words is "one billion, two hundred eighty-three million, two hundred thirty-four thousand, six hundred thirty-nine".