1283398859 has 4 divisors (see below), whose sum is σ = 1284721560. Its totient is φ = 1282076160.

The previous prime is 1283398843. The next prime is 1283398861. The reversal of 1283398859 is 9588933821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9588933821 = 24133 ⋅397337.

It is a cyclic number.

It is not a de Polignac number, because 1283398859 - 2⁴ = 1283398843 is a prime.

It is a super-2 number, since 2×1283398859² = 3294225262565003762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283398829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659894 + ... + 661835.

It is an arithmetic number, because the mean of its divisors is an integer number (321180390).

Almost surely, 2^1283398859 is an apocalyptic number.

1283398859 is a deficient number, since it is larger than the sum of its proper divisors (1322701).

1283398859 is an equidigital number, since it uses as much as digits as its factorization.

1283398859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322700.

The product of its digits is 3732480, while the sum is 56.

The square root of 1283398859 is about 35824.5566476405. The cubic root of 1283398859 is about 1086.7272308803.

The spelling of 1283398859 in words is "one billion, two hundred eighty-three million, three hundred ninety-eight thousand, eight hundred fifty-nine".