999940273 has 2 divisors, whose sum is σ = 999940274. Its totient is φ = 999940272.

The previous prime is 999940229. The next prime is 999940307. The reversal of 999940273 is 372049999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 882802944 + 117137329 = 29712^2 + 10823^2 .

It is a cyclic number.

It is not a de Polignac number, because 999940273 - 2¹³ = 999932081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999940273.

It is not a weakly prime, because it can be changed into another prime (999940223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499970136 + 499970137.

It is an arithmetic number, because the mean of its divisors is an integer number (499970137).

Almost surely, 2^999940273 is an apocalyptic number.

It is an amenable number.

999940273 is a deficient number, since it is larger than the sum of its proper divisors (1).

999940273 is an equidigital number, since it uses as much as digits as its factorization.

999940273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The square root of 999940273 is about 31621.8322207933. The cubic root of 999940273 is about 999.9800906036.

The spelling of 999940273 in words is "nine hundred ninety-nine million, nine hundred forty thousand, two hundred seventy-three".