129673634 has 4 divisors (see below), whose sum is σ = 194510454. Its totient is φ = 64836816.

The previous prime is 129673573. The next prime is 129673667. The reversal of 129673634 is 436376921.

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

It can be written as a sum of positive squares in only one way, i.e., 108097609 + 21576025 = 10397^2 + 4645^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129673591 and 129673600.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32418407 + ... + 32418410.

Almost surely, 2^129673634 is an apocalyptic number.

129673634 is a deficient number, since it is larger than the sum of its proper divisors (64836820).

129673634 is an equidigital number, since it uses as much as digits as its factorization.

129673634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64836819.

The product of its digits is 163296, while the sum is 41.

The square root of 129673634 is about 11387.4331611650. The cubic root of 129673634 is about 506.1554225801.

The spelling of 129673634 in words is "one hundred twenty-nine million, six hundred seventy-three thousand, six hundred thirty-four".