85949109 has 6 divisors (see below), whose sum is σ = 124148726. Its totient is φ = 57299400.

The previous prime is 85949107. The next prime is 85949111. The reversal of 85949109 is 90194958.

It is an interprime number because it is at equal distance from previous prime (85949107) and next prime (85949111).

It can be written as a sum of positive squares in only one way, i.e., 76475025 + 9474084 = 8745^2 + 3078^2 .

It is not a de Polignac number, because 85949109 - 2¹ = 85949107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85949107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4774942 + ... + 4774959.

Almost surely, 2^85949109 is an apocalyptic number.

It is an amenable number.

85949109 is a deficient number, since it is larger than the sum of its proper divisors (38199617).

85949109 is a wasteful number, since it uses less digits than its factorization.

85949109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549907 (or 9549904 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 85949109 is about 9270.8742306214. The cubic root of 85949109 is about 441.3134119611.

The spelling of 85949109 in words is "eighty-five million, nine hundred forty-nine thousand, one hundred nine".