1238766479 has 6 divisors (see below), whose sum is σ = 1280016720. Its totient is φ = 1198805340.

The previous prime is 1238766461. The next prime is 1238766547. The reversal of 1238766479 is 9746678321.

It is not a de Polignac number, because 1238766479 - 2²⁰ = 1237717903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1238766479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238766409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 643559 + ... + 645480.

It is an arithmetic number, because the mean of its divisors is an integer number (213336120).

Almost surely, 2^1238766479 is an apocalyptic number.

1238766479 is a deficient number, since it is larger than the sum of its proper divisors (41250241).

1238766479 is an equidigital number, since it uses as much as digits as its factorization.

1238766479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289101 (or 1289070 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 53.

The square root of 1238766479 is about 35196.1145440800. The cubic root of 1238766479 is about 1073.9807115771.

The spelling of 1238766479 in words is "one billion, two hundred thirty-eight million, seven hundred sixty-six thousand, four hundred seventy-nine".