6740397 has 6 divisors (see below), whose sum is σ = 9736142. Its totient is φ = 4493592.

The previous prime is 6740389. The next prime is 6740399. The reversal of 6740397 is 7930476.

It can be written as a sum of positive squares in only one way, i.e., 6625476 + 114921 = 2574^2 + 339^2 .

It is not a de Polignac number, because 6740397 - 2³ = 6740389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6740399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374458 + ... + 374475.

Almost surely, 2^6740397 is an apocalyptic number.

It is an amenable number.

6740397 is a deficient number, since it is larger than the sum of its proper divisors (2995745).

6740397 is a wasteful number, since it uses less digits than its factorization.

6740397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748939 (or 748936 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 6740397 is about 2596.2274553667. The cubic root of 6740397 is about 188.8984925657.

The spelling of 6740397 in words is "six million, seven hundred forty thousand, three hundred ninety-seven".