921449843 has 2 divisors, whose sum is σ = 921449844. Its totient is φ = 921449842.

The previous prime is 921449839. The next prime is 921449849. The reversal of 921449843 is 348944129.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921449843 - 2² = 921449839 is a prime.

It is equal to p_47049875 and since 921449843 and 47049875 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 921449794 and 921449803.

It is not a weakly prime, because it can be changed into another prime (921449849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460724921 + 460724922.

It is an arithmetic number, because the mean of its divisors is an integer number (460724922).

Almost surely, 2^921449843 is an apocalyptic number.

921449843 is a deficient number, since it is larger than the sum of its proper divisors (1).

921449843 is an equidigital number, since it uses as much as digits as its factorization.

921449843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 921449843 is about 30355.3923216288. The cubic root of 921449843 is about 973.0994642680.

The spelling of 921449843 in words is "nine hundred twenty-one million, four hundred forty-nine thousand, eight hundred forty-three".