867780497 has 2 divisors, whose sum is σ = 867780498. Its totient is φ = 867780496.

The previous prime is 867780493. The next prime is 867780533. The reversal of 867780497 is 794087768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 866772481 + 1008016 = 29441^2 + 1004^2 .

It is a cyclic number.

It is not a de Polignac number, because 867780497 - 2² = 867780493 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (867780491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433890248 + 433890249.

It is an arithmetic number, because the mean of its divisors is an integer number (433890249).

Almost surely, 2^867780497 is an apocalyptic number.

It is an amenable number.

867780497 is a deficient number, since it is larger than the sum of its proper divisors (1).

867780497 is an equidigital number, since it uses as much as digits as its factorization.

867780497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The square root of 867780497 is about 29458.1142811280. The cubic root of 867780497 is about 953.8277685144.

The spelling of 867780497 in words is "eight hundred sixty-seven million, seven hundred eighty thousand, four hundred ninety-seven".