851652647 has 4 divisors (see below), whose sum is σ = 851719440. Its totient is φ = 851585856.

The previous prime is 851652631. The next prime is 851652661. The reversal of 851652647 is 746256158.

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, and also an emirpimes, since its reverse is a distinct semiprime: 746256158 = 2 ⋅373128079.

It is a cyclic number.

It is not a de Polignac number, because 851652647 - 2⁴ = 851652631 is a prime.

It is a super-2 number, since 2×851652647² = 1450624462284213218, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 851652598 and 851652607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851652667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7658 + ... + 41975.

It is an arithmetic number, because the mean of its divisors is an integer number (212929860).

Almost surely, 2^851652647 is an apocalyptic number.

851652647 is a deficient number, since it is larger than the sum of its proper divisors (66793).

851652647 is a wasteful number, since it uses less digits than its factorization.

851652647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66792.

The product of its digits is 403200, while the sum is 44.

The square root of 851652647 is about 29183.0883732342. The cubic root of 851652647 is about 947.8817613072.

The spelling of 851652647 in words is "eight hundred fifty-one million, six hundred fifty-two thousand, six hundred forty-seven".