797551 has 2 divisors, whose sum is σ = 797552. Its totient is φ = 797550.

The previous prime is 797549. The next prime is 797557. The reversal of 797551 is 155797.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (155797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 797551 - 2¹ = 797549 is a prime.

Together with 797549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398775 + 398776.

It is an arithmetic number, because the mean of its divisors is an integer number (398776).

2⁷⁹⁷⁵⁵¹ is an apocalyptic number.

797551 is a deficient number, since it is larger than the sum of its proper divisors (1).

797551 is an equidigital number, since it uses as much as digits as its factorization.

797551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11025, while the sum is 34.

The square root of 797551 is about 893.0571090361. The cubic root of 797551 is about 92.7369527543.

The spelling of 797551 in words is "seven hundred ninety-seven thousand, five hundred fifty-one".