862796021 has 4 divisors (see below), whose sum is σ = 862862700. Its totient is φ = 862729344.

The previous prime is 862796003. The next prime is 862796041. The reversal of 862796021 is 120697268.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 62188996 + 800607025 = 7886^2 + 28295^2 .

It is a cyclic number.

It is not a de Polignac number, because 862796021 - 2¹⁴ = 862779637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 862796021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862796041) 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, 6986 + ... + 42123.

It is an arithmetic number, because the mean of its divisors is an integer number (215715675).

Almost surely, 2^862796021 is an apocalyptic number.

It is an amenable number.

862796021 is a deficient number, since it is larger than the sum of its proper divisors (66679).

862796021 is a wasteful number, since it uses less digits than its factorization.

862796021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66678.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 862796021 is about 29373.3896750103. The cubic root of 862796021 is about 951.9980186886.

The spelling of 862796021 in words is "eight hundred sixty-two million, seven hundred ninety-six thousand, twenty-one".