129472481269 has 4 divisors (see below), whose sum is σ = 129510198796. Its totient is φ = 129434763744.

The previous prime is 129472481227. The next prime is 129472481297. The reversal of 129472481269 is 962184274921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58388923044 + 71083558225 = 241638^2 + 266615^2 .

It is a cyclic number.

It is not a de Polignac number, because 129472481269 - 2¹⁷ = 129472350197 is a prime.

It is a super-2 number, since 2×129472481269² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129472481569) 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, 18853614 + ... + 18860479.

It is an arithmetic number, because the mean of its divisors is an integer number (32377549699).

Almost surely, 2^129472481269 is an apocalyptic number.

It is an amenable number.

129472481269 is a deficient number, since it is larger than the sum of its proper divisors (37717527).

129472481269 is an equidigital number, since it uses as much as digits as its factorization.

129472481269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37717526.

The product of its digits is 3483648, while the sum is 55.

The spelling of 129472481269 in words is "one hundred twenty-nine billion, four hundred seventy-two million, four hundred eighty-one thousand, two hundred sixty-nine".