129886073 has 4 divisors (see below), whose sum is σ = 133054068. Its totient is φ = 126718080.

The previous prime is 129886067. The next prime is 129886079. The reversal of 129886073 is 370688921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370688921 = 509 ⋅728269.

It is an interprime number because it is at equal distance from previous prime (129886067) and next prime (129886079).

It can be written as a sum of positive squares in 2 ways, for example, as 28440889 + 101445184 = 5333^2 + 10072^2 .

It is a cyclic number.

It is not a de Polignac number, because 129886073 - 2¹² = 129881977 is a prime.

It is a super-2 number, since 2×129886073² = 33740783918722658, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129886079) 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, 1583936 + ... + 1584017.

It is an arithmetic number, because the mean of its divisors is an integer number (33263517).

Almost surely, 2^129886073 is an apocalyptic number.

It is an amenable number.

129886073 is a deficient number, since it is larger than the sum of its proper divisors (3167995).

129886073 is an equidigital number, since it uses as much as digits as its factorization.

129886073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167994.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 129886073 is about 11396.7571264812. The cubic root of 129886073 is about 506.4316763381.

The spelling of 129886073 in words is "one hundred twenty-nine million, eight hundred eighty-six thousand, seventy-three".