1285763313 has 8 divisors (see below), whose sum is σ = 1721182176. Its totient is φ = 853760000.

The previous prime is 1285763293. The next prime is 1285763327. The reversal of 1285763313 is 3133675821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1285763313 - 2²⁶ = 1218654449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285763333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853008 + ... + 854513.

It is an arithmetic number, because the mean of its divisors is an integer number (215147772).

Almost surely, 2^1285763313 is an apocalyptic number.

It is an amenable number.

1285763313 is a deficient number, since it is larger than the sum of its proper divisors (435418863).

1285763313 is a wasteful number, since it uses less digits than its factorization.

1285763313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707775.

The product of its digits is 90720, while the sum is 39.

The square root of 1285763313 is about 35857.5419263507. The cubic root of 1285763313 is about 1087.3941942775.

The spelling of 1285763313 in words is "one billion, two hundred eighty-five million, seven hundred sixty-three thousand, three hundred thirteen".