867840651 has 12 divisors (see below), whose sum is σ = 1255600528. Its totient is φ = 577612944.

The previous prime is 867840619. The next prime is 867840653. The reversal of 867840651 is 156048768.

It is a happy number.

It is not a de Polignac number, because 867840651 - 2⁵ = 867840619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 867840597 and 867840606.

It is not an unprimeable number, because it can be changed into a prime (867840653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73135 + ... + 84168.

Almost surely, 2^867840651 is an apocalyptic number.

867840651 is a deficient number, since it is larger than the sum of its proper divisors (387759877).

867840651 is a wasteful number, since it uses less digits than its factorization.

867840651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157922 (or 157919 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 867840651 is about 29459.1352724414. The cubic root of 867840651 is about 953.8498075861.

The spelling of 867840651 in words is "eight hundred sixty-seven million, eight hundred forty thousand, six hundred fifty-one".