6897491 has 2 divisors, whose sum is σ = 6897492. Its totient is φ = 6897490.

The previous prime is 6897487. The next prime is 6897509. The reversal of 6897491 is 1947986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6897491 - 2² = 6897487 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6897431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3448745 + 3448746.

It is an arithmetic number, because the mean of its divisors is an integer number (3448746).

Almost surely, 2^6897491 is an apocalyptic number.

6897491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6897491 is an equidigital number, since it uses as much as digits as its factorization.

6897491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 6897491 is about 2626.3074839021. The cubic root of 6897491 is about 190.3547481348.

The spelling of 6897491 in words is "six million, eight hundred ninety-seven thousand, four hundred ninety-one".