2129473 has 2 divisors, whose sum is σ = 2129474. Its totient is φ = 2129472.

The previous prime is 2129447. The next prime is 2129497. The reversal of 2129473 is 3749212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1710864 + 418609 = 1308^2 + 647^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129473 - 2²¹ = 32321 is a prime.

2129473 is a lucky number.

It is equal to p₁₅₇₈₄₃ and since 2129473 and 157843 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2129423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064736 + 1064737.

It is an arithmetic number, because the mean of its divisors is an integer number (1064737).

2^2129473 is an apocalyptic number.

It is an amenable number.

2129473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129473 is an equidigital number, since it uses as much as digits as its factorization.

2129473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 2129473 is about 1459.2713935386. The cubic root of 2129473 is about 128.6542229219.

The spelling of 2129473 in words is "two million, one hundred twenty-nine thousand, four hundred seventy-three".