85120949 has 2 divisors, whose sum is σ = 85120950. Its totient is φ = 85120948.

The previous prime is 85120943. The next prime is 85120963. The reversal of 85120949 is 94902158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 41692849 = 6590^2 + 6457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85120949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85120943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42560474 + 42560475.

It is an arithmetic number, because the mean of its divisors is an integer number (42560475).

Almost surely, 2^85120949 is an apocalyptic number.

It is an amenable number.

85120949 is a deficient number, since it is larger than the sum of its proper divisors (1).

85120949 is an equidigital number, since it uses as much as digits as its factorization.

85120949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 85120949 is about 9226.1015060534. The cubic root of 85120949 is about 439.8914143205.

The spelling of 85120949 in words is "eighty-five million, one hundred twenty thousand, nine hundred forty-nine".