921906573 has 16 divisors (see below), whose sum is σ = 1405524480. Its totient is φ = 526535856.

The previous prime is 921906563. The next prime is 921906577. The reversal of 921906573 is 375609129.

It is not a de Polignac number, because 921906573 - 2¹⁰ = 921905549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921906577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35686 + ... + 55832.

It is an arithmetic number, because the mean of its divisors is an integer number (87845280).

Almost surely, 2^921906573 is an apocalyptic number.

It is an amenable number.

921906573 is a deficient number, since it is larger than the sum of its proper divisors (483617907).

921906573 is a wasteful number, since it uses less digits than its factorization.

921906573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22336.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 921906573 is about 30362.9144352119. The cubic root of 921906573 is about 973.2602146732.

The spelling of 921906573 in words is "nine hundred twenty-one million, nine hundred six thousand, five hundred seventy-three".