7489457 has 2 divisors, whose sum is σ = 7489458.
Its totient is φ = 7489456.
The previous prime is 7489423. The next prime is 7489463. The reversal of 7489457 is 7549847.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 7134241 + 355216 = 2671^2 + 596^2
It is an emirp because it is prime and its reverse (7549847) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 7489457 - 26 = 7489393 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (7489357) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3744728 + 3744729.
It is an arithmetic number, because the mean of its divisors is an integer number (3744729).
Almost surely, 27489457 is an apocalyptic number.
It is an amenable number.
7489457 is a deficient number, since it is larger than the sum of its proper divisors (1).
7489457 is an equidigital number, since it uses as much as digits as its factorization.
7489457 is an evil number, because the sum of its binary digits is even.
The product of its digits is 282240, while the sum is 44.
The square root of 7489457 is about 2736.6872309418.
The cubic root of 7489457 is about 195.6516180474.
The spelling of 7489457 in words is "seven million, four hundred eighty-nine thousand, four hundred fifty-seven".