13870479529 has 3 divisors (see below), whose sum is σ = 13870597303. Its totient is φ = 13870361756.

The previous prime is 13870479527. The next prime is 13870479551. The reversal of 13870479529 is 92597407831.

It is a happy number.

The square root of 13870479529 is 117773.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4177683225 + 9692796304 = 64635^2 + 98452^2 .

It is not a de Polignac number, because 13870479529 - 2¹ = 13870479527 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 13870479529.

It is not an unprimeable number, because it can be changed into a prime (13870479523) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 58887 + ... + 176659.

Almost surely, 2^13870479529 is an apocalyptic number.

13870479529 is the 117773-rd square number.

13870479529 is the 58887-th centered octagonal number.

It is an amenable number.

13870479529 is a deficient number, since it is larger than the sum of its proper divisors (117774).

13870479529 is an frugal number, since it uses more digits than its factorization.

13870479529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235546 (or 117773 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 13870479529 in words is "thirteen billion, eight hundred seventy million, four hundred seventy-nine thousand, five hundred twenty-nine".