827190977 has 2 divisors, whose sum is σ = 827190978. Its totient is φ = 827190976.

The previous prime is 827190971. The next prime is 827190989. The reversal of 827190977 is 779091728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572597041 + 254593936 = 23929^2 + 15956^2 .

It is a cyclic number.

It is not a de Polignac number, because 827190977 - 2¹⁰ = 827189953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (827190971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413595488 + 413595489.

It is an arithmetic number, because the mean of its divisors is an integer number (413595489).

Almost surely, 2^827190977 is an apocalyptic number.

It is an amenable number.

827190977 is a deficient number, since it is larger than the sum of its proper divisors (1).

827190977 is an equidigital number, since it uses as much as digits as its factorization.

827190977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 50.

The square root of 827190977 is about 28760.9279579085. The cubic root of 827190977 is about 938.7182534331.

The spelling of 827190977 in words is "eight hundred twenty-seven million, one hundred ninety thousand, nine hundred seventy-seven".