85092989 has 8 divisors (see below), whose sum is σ = 89019000. Its totient is φ = 81233152.

The previous prime is 85092979. The next prime is 85093027. The reversal of 85092989 is 98929058.

It can be written as a sum of positive squares in 4 ways, for example, as 2592100 + 82500889 = 1610^2 + 9083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85092989 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85092919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13904 + ... + 19065.

It is an arithmetic number, because the mean of its divisors is an integer number (11127375).

Almost surely, 2^85092989 is an apocalyptic number.

85092989 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

85092989 is a deficient number, since it is larger than the sum of its proper divisors (3926011).

85092989 is a wasteful number, since it uses less digits than its factorization.

85092989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33087.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 85092989 is about 9224.5861153767. The cubic root of 85092989 is about 439.8432447806.

It can be divided in two parts, 850 and 92989, that added together give a palindrome (93839).

The spelling of 85092989 in words is "eighty-five million, ninety-two thousand, nine hundred eighty-nine".