921949 has 4 divisors (see below), whose sum is σ = 1053664. Its totient is φ = 790236.

The previous prime is 921931. The next prime is 921959. The reversal of 921949 is 949129.

921949 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 921949 - 2⁷ = 921821 is a prime.

It is a Duffinian number.

921949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921919) 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, 65847 + ... + 65860.

It is an arithmetic number, because the mean of its divisors is an integer number (263416).

2⁹²¹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

921949 is a deficient number, since it is larger than the sum of its proper divisors (131715).

921949 is a wasteful number, since it uses less digits than its factorization.

921949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131714.

The product of its digits is 5832, while the sum is 34.

The square root of 921949 is about 960.1817536279. The cubic root of 921949 is about 97.3275144558.

The spelling of 921949 in words is "nine hundred twenty-one thousand, nine hundred forty-nine".