85155949 has 2 divisors, whose sum is σ = 85155950. Its totient is φ = 85155948.

The previous prime is 85155947. The next prime is 85155979. The reversal of 85155949 is 94955158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82482724 + 2673225 = 9082^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 85155949 - 2¹ = 85155947 is a prime.

Together with 85155947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 85155899 and 85155908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85155947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42577974 + 42577975.

It is an arithmetic number, because the mean of its divisors is an integer number (42577975).

Almost surely, 2^85155949 is an apocalyptic number.

It is an amenable number.

85155949 is a deficient number, since it is larger than the sum of its proper divisors (1).

85155949 is an equidigital number, since it uses as much as digits as its factorization.

85155949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 46.

The square root of 85155949 is about 9227.9981035976. The cubic root of 85155949 is about 439.9516975213.

The spelling of 85155949 in words is "eighty-five million, one hundred fifty-five thousand, nine hundred forty-nine".