861768207 has 8 divisors (see below), whose sum is σ = 1276693680. Its totient is φ = 574512120.

The previous prime is 861768197. The next prime is 861768211. The reversal of 861768207 is 702867168.

861768207 is a `hidden beast` number, since 8 + 617 + 6 + 8 + 20 + 7 = 666.

It is not a de Polignac number, because 861768207 - 2²² = 857573903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861768227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15958644 + ... + 15958697.

It is an arithmetic number, because the mean of its divisors is an integer number (159586710).

Almost surely, 2^861768207 is an apocalyptic number.

861768207 is a deficient number, since it is larger than the sum of its proper divisors (414925473).

861768207 is a wasteful number, since it uses less digits than its factorization.

861768207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31917350 (or 31917344 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 861768207 is about 29355.8887959469. Note that the first 3 decimals coincide. The cubic root of 861768207 is about 951.6198429031.

The spelling of 861768207 in words is "eight hundred sixty-one million, seven hundred sixty-eight thousand, two hundred seven".