2173505629 has 2 divisors, whose sum is σ = 2173505630. Its totient is φ = 2173505628.

The previous prime is 2173505623. The next prime is 2173505657. The reversal of 2173505629 is 9265053712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1966922500 + 206583129 = 44350^2 + 14373^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173505629 - 2⁵ = 2173505597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2173505591 and 2173505600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173505623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086752814 + 1086752815.

It is an arithmetic number, because the mean of its divisors is an integer number (1086752815).

Almost surely, 2^2173505629 is an apocalyptic number.

It is an amenable number.

2173505629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173505629 is an equidigital number, since it uses as much as digits as its factorization.

2173505629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 2173505629 is about 46620.8711737565. The cubic root of 2173505629 is about 1295.3493845187.

The spelling of 2173505629 in words is "two billion, one hundred seventy-three million, five hundred five thousand, six hundred twenty-nine".