129974194 has 16 divisors (see below), whose sum is σ = 223267968. Its totient is φ = 55589472.

The previous prime is 129974191. The next prime is 129974203. The reversal of 129974194 is 491479921.

129974194 = 2141² + 2142² + ... + 2168².

It is a super-2 number, since 2×129974194² = 33786582211899272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129974191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2187 + ... + 16270.

It is an arithmetic number, because the mean of its divisors is an integer number (13954248).

Almost surely, 2^129974194 is an apocalyptic number.

129974194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129974194 is a deficient number, since it is larger than the sum of its proper divisors (93293774).

129974194 is a wasteful number, since it uses less digits than its factorization.

129974194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18969.

The product of its digits is 163296, while the sum is 46.

The square root of 129974194 is about 11400.6225268623. The cubic root of 129974194 is about 506.5461797027.

The spelling of 129974194 in words is "one hundred twenty-nine million, nine hundred seventy-four thousand, one hundred ninety-four".