472192909 has 2 divisors, whose sum is σ = 472192910. Its totient is φ = 472192908.

The previous prime is 472192849. The next prime is 472192939. The reversal of 472192909 is 909291274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472192900 + 9 = 21730^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 472192909 - 2⁷ = 472192781 is a prime.

It is a super-2 number, since 2×472192909² = 445932286619764562, which contains 22 as substring.

It is equal to p_24965638 and since 472192909 and 24965638 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (472192939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236096454 + 236096455.

It is an arithmetic number, because the mean of its divisors is an integer number (236096455).

Almost surely, 2^472192909 is an apocalyptic number.

It is an amenable number.

472192909 is a deficient number, since it is larger than the sum of its proper divisors (1).

472192909 is an equidigital number, since it uses as much as digits as its factorization.

472192909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 472192909 is about 21730.0002070870. Note that the first 3 decimals coincide. The cubic root of 472192909 is about 778.7053413324.

The spelling of 472192909 in words is "four hundred seventy-two million, one hundred ninety-two thousand, nine hundred nine".