7253639 has 2 divisors, whose sum is σ = 7253640. Its totient is φ = 7253638.

The previous prime is 7253599. The next prime is 7253641. The reversal of 7253639 is 9363527.

It is a strong prime.

It is an emirp because it is prime and its reverse (9363527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7253639 is a prime.

It is a super-4 number, since 4×7253639⁴ (a number of 29 digits) contains 4444 as substring.

Together with 7253641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7253599 and 7253608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7253669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3626819 + 3626820.

It is an arithmetic number, because the mean of its divisors is an integer number (3626820).

Almost surely, 2^7253639 is an apocalyptic number.

7253639 is a deficient number, since it is larger than the sum of its proper divisors (1).

7253639 is an equidigital number, since it uses as much as digits as its factorization.

7253639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 35.

The square root of 7253639 is about 2693.2580641298. The cubic root of 7253639 is about 193.5762085004.

The spelling of 7253639 in words is "seven million, two hundred fifty-three thousand, six hundred thirty-nine".