7840253 has 2 divisors, whose sum is σ = 7840254. Its totient is φ = 7840252.

The previous prime is 7840207. The next prime is 7840267. The reversal of 7840253 is 3520487.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7828804 + 11449 = 2798^2 + 107^2 .

It is an emirp because it is prime and its reverse (3520487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7840253 - 2¹⁴ = 7823869 is a prime.

It is a super-2 number, since 2×7840253² = 122939134208018, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7840153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3920126 + 3920127.

It is an arithmetic number, because the mean of its divisors is an integer number (3920127).

Almost surely, 2^7840253 is an apocalyptic number.

It is an amenable number.

7840253 is a deficient number, since it is larger than the sum of its proper divisors (1).

7840253 is an equidigital number, since it uses as much as digits as its factorization.

7840253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 7840253 is about 2800.0451782070. The cubic root of 7840253 is about 198.6598145743.

The spelling of 7840253 in words is "seven million, eight hundred forty thousand, two hundred fifty-three".