999272473 has 2 divisors, whose sum is σ = 999272474. Its totient is φ = 999272472.

The previous prime is 999272471. The next prime is 999272489. The reversal of 999272473 is 374272999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501625609 + 497646864 = 22397^2 + 22308^2 .

It is an emirp because it is prime and its reverse (374272999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999272473 - 2¹ = 999272471 is a prime.

It is a super-3 number, since 3×999272473³ (a number of 28 digits) contains 333 as substring.

Together with 999272471, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 999272473.

It is not a weakly prime, because it can be changed into another prime (999272471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499636236 + 499636237.

It is an arithmetic number, because the mean of its divisors is an integer number (499636237).

Almost surely, 2^999272473 is an apocalyptic number.

It is an amenable number.

999272473 is a deficient number, since it is larger than the sum of its proper divisors (1).

999272473 is an equidigital number, since it uses as much as digits as its factorization.

999272473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 52.

The square root of 999272473 is about 31611.2712968017. The cubic root of 999272473 is about 999.7574321656.

It can be divided in two parts, 99927 and 2473, that added together give a square (102400 = 320²).

The spelling of 999272473 in words is "nine hundred ninety-nine million, two hundred seventy-two thousand, four hundred seventy-three".