1662343253 has 2 divisors, whose sum is σ = 1662343254. Its totient is φ = 1662343252.

The previous prime is 1662343213. The next prime is 1662343279. The reversal of 1662343253 is 3523432661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1251956689 + 410386564 = 35383^2 + 20258^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662343253 - 2¹² = 1662339157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662343213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831171626 + 831171627.

It is an arithmetic number, because the mean of its divisors is an integer number (831171627).

Almost surely, 2^1662343253 is an apocalyptic number.

It is an amenable number.

1662343253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662343253 is an equidigital number, since it uses as much as digits as its factorization.

1662343253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 35.

The square root of 1662343253 is about 40771.8438754001. The cubic root of 1662343253 is about 1184.6050190072.

The spelling of 1662343253 in words is "one billion, six hundred sixty-two million, three hundred forty-three thousand, two hundred fifty-three".