129673478 has 8 divisors (see below), whose sum is σ = 212193000. Its totient is φ = 58942480.

The previous prime is 129673463. The next prime is 129673483. The reversal of 129673478 is 874376921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2947103 + ... + 2947146.

It is an arithmetic number, because the mean of its divisors is an integer number (26524125).

Almost surely, 2^129673478 is an apocalyptic number.

129673478 is a deficient number, since it is larger than the sum of its proper divisors (82519522).

129673478 is a wasteful number, since it uses less digits than its factorization.

129673478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5894262.

The product of its digits is 508032, while the sum is 47.

The square root of 129673478 is about 11387.4263115069. The cubic root of 129673478 is about 506.1552196083.

The spelling of 129673478 in words is "one hundred twenty-nine million, six hundred seventy-three thousand, four hundred seventy-eight".