129079534 has 4 divisors (see below), whose sum is σ = 193619304. Its totient is φ = 64539766.

The previous prime is 129079523. The next prime is 129079541. The reversal of 129079534 is 435970921.

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

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, 32269882 + ... + 32269885.

It is an arithmetic number, because the mean of its divisors is an integer number (48404826).

Almost surely, 2^129079534 is an apocalyptic number.

129079534 is a deficient number, since it is larger than the sum of its proper divisors (64539770).

129079534 is an equidigital number, since it uses as much as digits as its factorization.

129079534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64539769.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 129079534 is about 11361.3174412125. The cubic root of 129079534 is about 505.3812550810.

The spelling of 129079534 in words is "one hundred twenty-nine million, seventy-nine thousand, five hundred thirty-four".