8739397 has 2 divisors, whose sum is σ = 8739398. Its totient is φ = 8739396.

The previous prime is 8739391. The next prime is 8739431. The reversal of 8739397 is 7939378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5171076 + 3568321 = 2274^2 + 1889^2 .

8739397 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 8739397 - 2³ = 8739389 is a prime.

8739397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8739391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4369698 + 4369699.

It is an arithmetic number, because the mean of its divisors is an integer number (4369699).

Almost surely, 2^8739397 is an apocalyptic number.

It is an amenable number.

8739397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8739397 is an equidigital number, since it uses as much as digits as its factorization.

8739397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 8739397 is about 2956.2471141635. The cubic root of 8739397 is about 205.9809970846.

The spelling of 8739397 in words is "eight million, seven hundred thirty-nine thousand, three hundred ninety-seven".