921325609 has 2 divisors, whose sum is σ = 921325610. Its totient is φ = 921325608.

The previous prime is 921325589. The next prime is 921325633. The reversal of 921325609 is 906523129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471758400 + 449567209 = 21720^2 + 21203^2 .

It is an emirp because it is prime and its reverse (906523129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921325609 - 2⁵ = 921325577 is a prime.

It is equal to p_47043874 and since 921325609 and 47043874 have the same sum of digits, it is a Honaker prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460662804 + 460662805.

It is an arithmetic number, because the mean of its divisors is an integer number (460662805).

Almost surely, 2^921325609 is an apocalyptic number.

It is an amenable number.

921325609 is a deficient number, since it is larger than the sum of its proper divisors (1).

921325609 is an equidigital number, since it uses as much as digits as its factorization.

921325609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 921325609 is about 30353.3459275909. The cubic root of 921325609 is about 973.0557297579.

The spelling of 921325609 in words is "nine hundred twenty-one million, three hundred twenty-five thousand, six hundred nine".