85380649 has 4 divisors (see below), whose sum is σ = 85399380. Its totient is φ = 85361920.

The previous prime is 85380643. The next prime is 85380667. The reversal of 85380649 is 94608358.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13249600 + 72131049 = 3640^2 + 8493^2 .

It is a cyclic number.

It is not a de Polignac number, because 85380649 - 2³ = 85380641 is a prime.

It is a super-2 number, since 2×85380649² = 14579710447322402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85380641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397 + ... + 13285.

It is an arithmetic number, because the mean of its divisors is an integer number (21349845).

Almost surely, 2^85380649 is an apocalyptic number.

It is an amenable number.

85380649 is a deficient number, since it is larger than the sum of its proper divisors (18731).

85380649 is a wasteful number, since it uses less digits than its factorization.

85380649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18730.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 85380649 is about 9240.1649877045. The cubic root of 85380649 is about 440.3383227807.

The spelling of 85380649 in words is "eighty-five million, three hundred eighty thousand, six hundred forty-nine".