6945399 has 16 divisors (see below), whose sum is σ = 10460640. Its totient is φ = 4553280.

The previous prime is 6945397. The next prime is 6945437. The reversal of 6945399 is 9935496.

It is a happy number.

It is not a de Polignac number, because 6945399 - 2¹ = 6945397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6945397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462 + ... + 3755.

It is an arithmetic number, because the mean of its divisors is an integer number (653790).

Almost surely, 2^6945399 is an apocalyptic number.

6945399 is a deficient number, since it is larger than the sum of its proper divisors (3515241).

6945399 is a wasteful number, since it uses less digits than its factorization.

6945399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4281 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 6945399 is about 2635.4124914328. The cubic root of 6945399 is about 190.7944482384.

The spelling of 6945399 in words is "six million, nine hundred forty-five thousand, three hundred ninety-nine".