129491354 has 4 divisors (see below), whose sum is σ = 194237034. Its totient is φ = 64745676.

The previous prime is 129491347. The next prime is 129491387. The reversal of 129491354 is 453194921.

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., 129436129 + 55225 = 11377^2 + 235^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32372837 + ... + 32372840.

Almost surely, 2^129491354 is an apocalyptic number.

129491354 is a deficient number, since it is larger than the sum of its proper divisors (64745680).

129491354 is an equidigital number, since it uses as much as digits as its factorization.

129491354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64745679.

The product of its digits is 38880, while the sum is 38.

The square root of 129491354 is about 11379.4267869695. The cubic root of 129491354 is about 505.9181467059.

The spelling of 129491354 in words is "one hundred twenty-nine million, four hundred ninety-one thousand, three hundred fifty-four".