85780367 has 2 divisors, whose sum is σ = 85780368. Its totient is φ = 85780366.

The previous prime is 85780339. The next prime is 85780381. The reversal of 85780367 is 76308758.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85780367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85780337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42890183 + 42890184.

It is an arithmetic number, because the mean of its divisors is an integer number (42890184).

Almost surely, 2^85780367 is an apocalyptic number.

85780367 is a deficient number, since it is larger than the sum of its proper divisors (1).

85780367 is an equidigital number, since it uses as much as digits as its factorization.

85780367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 85780367 is about 9261.7691074654. The cubic root of 85780367 is about 441.0244157721.

The spelling of 85780367 in words is "eighty-five million, seven hundred eighty thousand, three hundred sixty-seven".