867856977 has 64 divisors (see below), whose sum is σ = 1467648000. Its totient is φ = 502438464.

The previous prime is 867856973. The next prime is 867856993. The reversal of 867856977 is 779658768.

867856977 is a `hidden beast` number, since 8 + 67 + 8 + 569 + 7 + 7 = 666.

It is not a de Polignac number, because 867856977 - 2² = 867856973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867856973) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1193388 + ... + 1194114.

It is an arithmetic number, because the mean of its divisors is an integer number (22932000).

Almost surely, 2^867856977 is an apocalyptic number.

It is an amenable number.

867856977 is a deficient number, since it is larger than the sum of its proper divisors (599791023).

867856977 is a wasteful number, since it uses less digits than its factorization.

867856977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 941 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The square root of 867856977 is about 29459.4123668481. The cubic root of 867856977 is about 953.8557888893.

The spelling of 867856977 in words is "eight hundred sixty-seven million, eight hundred fifty-six thousand, nine hundred seventy-seven".