802638647 has 2 divisors, whose sum is σ = 802638648. Its totient is φ = 802638646.

The previous prime is 802638643. The next prime is 802638649. The reversal of 802638647 is 746836208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 802638647 - 2² = 802638643 is a prime.

Together with 802638649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 802638598 and 802638607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (802638643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401319323 + 401319324.

It is an arithmetic number, because the mean of its divisors is an integer number (401319324).

Almost surely, 2^802638647 is an apocalyptic number.

802638647 is a deficient number, since it is larger than the sum of its proper divisors (1).

802638647 is an equidigital number, since it uses as much as digits as its factorization.

802638647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 802638647 is about 28330.8779779237. The cubic root of 802638647 is about 929.3372728650.

The spelling of 802638647 in words is "eight hundred two million, six hundred thirty-eight thousand, six hundred forty-seven".