920936647 has 4 divisors (see below), whose sum is σ = 922251096. Its totient is φ = 919622200.

The previous prime is 920936603. The next prime is 920936651. The reversal of 920936647 is 746639029.

920936647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 920936647 - 2⁷ = 920936519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920936597 and 920936606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920936657) 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, 656173 + ... + 657574.

It is an arithmetic number, because the mean of its divisors is an integer number (230562774).

Almost surely, 2^920936647 is an apocalyptic number.

920936647 is a deficient number, since it is larger than the sum of its proper divisors (1314449).

920936647 is a wasteful number, since it uses less digits than its factorization.

920936647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314448.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 920936647 is about 30346.9380168741. The cubic root of 920936647 is about 972.9187767366.

The spelling of 920936647 in words is "nine hundred twenty million, nine hundred thirty-six thousand, six hundred forty-seven".