85815383 has 2 divisors, whose sum is σ = 85815384. Its totient is φ = 85815382.

The previous prime is 85815341. The next prime is 85815397. The reversal of 85815383 is 38351858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85815383 - 2¹⁶ = 85749847 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85815383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85815283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42907691 + 42907692.

It is an arithmetic number, because the mean of its divisors is an integer number (42907692).

Almost surely, 2^85815383 is an apocalyptic number.

85815383 is a deficient number, since it is larger than the sum of its proper divisors (1).

85815383 is an equidigital number, since it uses as much as digits as its factorization.

85815383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 41.

The square root of 85815383 is about 9263.6592661863. The cubic root of 85815383 is about 441.0844171091.

The spelling of 85815383 in words is "eighty-five million, eight hundred fifteen thousand, three hundred eighty-three".