129014378 has 4 divisors (see below), whose sum is σ = 193521570. Its totient is φ = 64507188.

The previous prime is 129014371. The next prime is 129014393. The reversal of 129014378 is 873410921.

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., 91718929 + 37295449 = 9577^2 + 6107^2 .

It is not an unprimeable number, because it can be changed into a prime (129014371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32253593 + ... + 32253596.

Almost surely, 2^129014378 is an apocalyptic number.

129014378 is a deficient number, since it is larger than the sum of its proper divisors (64507192).

129014378 is an equidigital number, since it uses as much as digits as its factorization.

129014378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64507191.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 129014378 is about 11358.4496301212. The cubic root of 129014378 is about 505.2962063205.

The spelling of 129014378 in words is "one hundred twenty-nine million, fourteen thousand, three hundred seventy-eight".