7405397 has 2 divisors, whose sum is σ = 7405398. Its totient is φ = 7405396.

The previous prime is 7405369. The next prime is 7405399. The reversal of 7405397 is 7935047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7365796 + 39601 = 2714^2 + 199^2 .

It is an emirp because it is prime and its reverse (7935047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7405397 - 2⁸ = 7405141 is a prime.

It is a super-3 number, since 3×7405397³ (a number of 22 digits) contains 333 as substring.

Together with 7405399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7405399) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702698 + 3702699.

It is an arithmetic number, because the mean of its divisors is an integer number (3702699).

Almost surely, 2^7405397 is an apocalyptic number.

It is an amenable number.

7405397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7405397 is an equidigital number, since it uses as much as digits as its factorization.

7405397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 7405397 is about 2721.2859092716. The cubic root of 7405397 is about 194.9168788844.

The spelling of 7405397 in words is "seven million, four hundred five thousand, three hundred ninety-seven".