1662047273 has 2 divisors, whose sum is σ = 1662047274. Its totient is φ = 1662047272.

The previous prime is 1662047239. The next prime is 1662047281. The reversal of 1662047273 is 3727402661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1661622169 + 425104 = 40763^2 + 652^2 .

It is an emirp because it is prime and its reverse (3727402661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1662047273 - 2⁶ = 1662047209 is a prime.

It is a super-2 number, since 2×1662047273² = 5524802275373473058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1662047203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831023636 + 831023637.

It is an arithmetic number, because the mean of its divisors is an integer number (831023637).

Almost surely, 2^1662047273 is an apocalyptic number.

It is an amenable number.

1662047273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662047273 is an equidigital number, since it uses as much as digits as its factorization.

1662047273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 1662047273 is about 40768.2140030686. The cubic root of 1662047273 is about 1184.5347085776.

The spelling of 1662047273 in words is "one billion, six hundred sixty-two million, forty-seven thousand, two hundred seventy-three".