921400223 has 2 divisors, whose sum is σ = 921400224. Its totient is φ = 921400222.

The previous prime is 921400189. The next prime is 921400237. The reversal of 921400223 is 322004129.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921400223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921400243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460700111 + 460700112.

It is an arithmetic number, because the mean of its divisors is an integer number (460700112).

Almost surely, 2^921400223 is an apocalyptic number.

921400223 is a deficient number, since it is larger than the sum of its proper divisors (1).

921400223 is an equidigital number, since it uses as much as digits as its factorization.

921400223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 921400223 is about 30354.5749929068. The cubic root of 921400223 is about 973.0819968451.

The spelling of 921400223 in words is "nine hundred twenty-one million, four hundred thousand, two hundred twenty-three".