129382534 has 4 divisors (see below), whose sum is σ = 194073804. Its totient is φ = 64691266.

The previous prime is 129382501. The next prime is 129382553. The reversal of 129382534 is 435283921.

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

It is a super-2 number, since 2×129382534² = 33479680208522312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129382493 and 129382502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32345632 + ... + 32345635.

It is an arithmetic number, because the mean of its divisors is an integer number (48518451).

Almost surely, 2^129382534 is an apocalyptic number.

129382534 is a deficient number, since it is larger than the sum of its proper divisors (64691270).

129382534 is an equidigital number, since it uses as much as digits as its factorization.

129382534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64691269.

The product of its digits is 51840, while the sum is 37.

The square root of 129382534 is about 11374.6443460884. The cubic root of 129382534 is about 505.7763883567.

The spelling of 129382534 in words is "one hundred twenty-nine million, three hundred eighty-two thousand, five hundred thirty-four".