129806473 has 2 divisors, whose sum is σ = 129806474. Its totient is φ = 129806472.

The previous prime is 129806449. The next prime is 129806489. The reversal of 129806473 is 374608921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106254864 + 23551609 = 10308^2 + 4853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129806473 is a prime.

It is not a weakly prime, because it can be changed into another prime (129806773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64903236 + 64903237.

It is an arithmetic number, because the mean of its divisors is an integer number (64903237).

Almost surely, 2^129806473 is an apocalyptic number.

It is an amenable number.

129806473 is a deficient number, since it is larger than the sum of its proper divisors (1).

129806473 is an equidigital number, since it uses as much as digits as its factorization.

129806473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 129806473 is about 11393.2643697932. The cubic root of 129806473 is about 506.3282005296.

The spelling of 129806473 in words is "one hundred twenty-nine million, eight hundred six thousand, four hundred seventy-three".