862946721 has 96 divisors (see below), whose sum is σ = 1624197120. Its totient is φ = 429235200.

The previous prime is 862946719. The next prime is 862946753. The reversal of 862946721 is 127649268.

It is a happy number.

It is not a de Polignac number, because 862946721 - 2¹ = 862946719 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (862946771) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1040535 + ... + 1041363.

It is an arithmetic number, because the mean of its divisors is an integer number (16918720).

Almost surely, 2^862946721 is an apocalyptic number.

It is an amenable number.

862946721 is a deficient number, since it is larger than the sum of its proper divisors (761250399).

862946721 is a wasteful number, since it uses less digits than its factorization.

862946721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 924 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 862946721 is about 29375.9548100143. The cubic root of 862946721 is about 952.0534422750.

The spelling of 862946721 in words is "eight hundred sixty-two million, nine hundred forty-six thousand, seven hundred twenty-one".