129694601 has 4 divisors (see below), whose sum is σ = 131820804. Its totient is φ = 127568400.

The previous prime is 129694597. The next prime is 129694633. The reversal of 129694601 is 106496921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106496921 = 523 ⋅203627.

It can be written as a sum of positive squares in 2 ways, for example, as 50751376 + 78943225 = 7124^2 + 8885^2 .

It is a cyclic number.

It is not a de Polignac number, because 129694601 - 2² = 129694597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129694661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063010 + ... + 1063131.

It is an arithmetic number, because the mean of its divisors is an integer number (32955201).

Almost surely, 2^129694601 is an apocalyptic number.

It is an amenable number.

129694601 is a deficient number, since it is larger than the sum of its proper divisors (2126203).

129694601 is an equidigital number, since it uses as much as digits as its factorization.

129694601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126202.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129694601 is about 11388.3537440668. The cubic root of 129694601 is about 506.1827012913.

The spelling of 129694601 in words is "one hundred twenty-nine million, six hundred ninety-four thousand, six hundred one".