472909 has 2 divisors, whose sum is σ = 472910. Its totient is φ = 472908.

The previous prime is 472907. The next prime is 472921. The reversal of 472909 is 909274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 459684 + 13225 = 678^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 472909 - 2¹ = 472907 is a prime.

Together with 472907, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236454 + 236455.

It is an arithmetic number, because the mean of its divisors is an integer number (236455).

2⁴⁷²⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

472909 is a deficient number, since it is larger than the sum of its proper divisors (1).

472909 is an equidigital number, since it uses as much as digits as its factorization.

472909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 472909 is about 687.6837936145. The cubic root of 472909 is about 77.9098783808.

Subtracting from 472909 its sum of digits (31), we obtain a triangular number (472878 = T₉₇₂).

The spelling of 472909 in words is "four hundred seventy-two thousand, nine hundred nine".