879797 has 2 divisors, whose sum is σ = 879798. Its totient is φ = 879796.

The previous prime is 879743. The next prime is 879799. The reversal of 879797 is 797978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481636 + 398161 = 694^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 879797 - 2¹² = 875701 is a prime.

It is a super-2 number, since 2×879797² = 1548085522418, which contains 22 as substring.

Together with 879799, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (879799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439898 + 439899.

It is an arithmetic number, because the mean of its divisors is an integer number (439899).

2⁸⁷⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

879797 is a deficient number, since it is larger than the sum of its proper divisors (1).

879797 is an equidigital number, since it uses as much as digits as its factorization.

879797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 47.

The square root of 879797 is about 937.9749463605. The cubic root of 879797 is about 95.8210279516.

Adding to 879797 its sum of digits (47), we get a square (879844 = 938²).

The spelling of 879797 in words is "eight hundred seventy-nine thousand, seven hundred ninety-seven".