129326397 has 16 divisors (see below), whose sum is σ = 175472640. Its totient is φ = 84709872.

The previous prime is 129326387. The next prime is 129326437. The reversal of 129326397 is 793623921.

It is not a de Polignac number, because 129326397 - 2⁴ = 129326381 is a prime.

It is a super-2 number, since 2×129326397² = 33450633922003218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129326357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51628 + ... + 54074.

It is an arithmetic number, because the mean of its divisors is an integer number (10967040).

Almost surely, 2^129326397 is an apocalyptic number.

It is an amenable number.

129326397 is a deficient number, since it is larger than the sum of its proper divisors (46146243).

129326397 is a wasteful number, since it uses less digits than its factorization.

129326397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its digits is 122472, while the sum is 42.

The square root of 129326397 is about 11372.1764407698. The cubic root of 129326397 is about 505.7032283620.

The spelling of 129326397 in words is "one hundred twenty-nine million, three hundred twenty-six thousand, three hundred ninety-seven".