6456739 has 2 divisors, whose sum is σ = 6456740. Its totient is φ = 6456738.

The previous prime is 6456733. The next prime is 6456743. The reversal of 6456739 is 9376546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6456739 - 2³ = 6456731 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (6456731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228369 + 3228370.

It is an arithmetic number, because the mean of its divisors is an integer number (3228370).

Almost surely, 2^6456739 is an apocalyptic number.

6456739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6456739 is an equidigital number, since it uses as much as digits as its factorization.

6456739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 6456739 is about 2541.0114128040. The cubic root of 6456739 is about 186.2106047032.

The spelling of 6456739 in words is "six million, four hundred fifty-six thousand, seven hundred thirty-nine".