921634 has 8 divisors (see below), whose sum is σ = 1579968. Its totient is φ = 394980.

The previous prime is 921629. The next prime is 921637. The reversal of 921634 is 436129.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 921599 and 921608.

It is not an unprimeable number, because it can be changed into a prime (921637) 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, 32902 + ... + 32929.

It is an arithmetic number, because the mean of its divisors is an integer number (197496).

2⁹²¹⁶³⁴ is an apocalyptic number.

921634 is a deficient number, since it is larger than the sum of its proper divisors (658334).

921634 is a wasteful number, since it uses less digits than its factorization.

921634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65840.

The product of its digits is 1296, while the sum is 25.

The square root of 921634 is about 960.0177081700. The cubic root of 921634 is about 97.3164286440.

The spelling of 921634 in words is "nine hundred twenty-one thousand, six hundred thirty-four".