2085417977 has 4 divisors (see below), whose sum is σ = 2124765540. Its totient is φ = 2046070416.

The previous prime is 2085417967. The next prime is 2085417991. The reversal of 2085417977 is 7797145802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7797145802 = 2 ⋅3898572901.

It can be written as a sum of positive squares in 2 ways, for example, as 956726761 + 1128691216 = 30931^2 + 33596^2 .

It is a cyclic number.

It is not a de Polignac number, because 2085417977 - 2⁸ = 2085417721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2085417907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19673702 + ... + 19673807.

It is an arithmetic number, because the mean of its divisors is an integer number (531191385).

Almost surely, 2^2085417977 is an apocalyptic number.

It is an amenable number.

2085417977 is a deficient number, since it is larger than the sum of its proper divisors (39347563).

2085417977 is an equidigital number, since it uses as much as digits as its factorization.

2085417977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39347562.

The product of its (nonzero) digits is 987840, while the sum is 50.

The square root of 2085417977 is about 45666.3768762095. The cubic root of 2085417977 is about 1277.6082405418.

The spelling of 2085417977 in words is "two billion, eighty-five million, four hundred seventeen thousand, nine hundred seventy-seven".