85663379 has 4 divisors (see below), whose sum is σ = 86421576. Its totient is φ = 84905184.

The previous prime is 85663313. The next prime is 85663393. The reversal of 85663379 is 97336658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85663379 - 2¹² = 85659283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85668379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378929 + ... + 379154.

It is an arithmetic number, because the mean of its divisors is an integer number (21605394).

Almost surely, 2^85663379 is an apocalyptic number.

85663379 is a deficient number, since it is larger than the sum of its proper divisors (758197).

85663379 is a wasteful number, since it uses less digits than its factorization.

85663379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758196.

The product of its digits is 816480, while the sum is 47.

The square root of 85663379 is about 9255.4513126049. The cubic root of 85663379 is about 440.8238335993.

The spelling of 85663379 in words is "eighty-five million, six hundred sixty-three thousand, three hundred seventy-nine".