924999989 has 2 divisors, whose sum is σ = 924999990. Its totient is φ = 924999988.

The previous prime is 924999983. The next prime is 924999991. The reversal of 924999989 is 989999429.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 903303025 + 21696964 = 30055^2 + 4658^2 .

It is an emirp because it is prime and its reverse (989999429) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 924999989 - 2⁴ = 924999973 is a prime.

It is a Sophie Germain prime.

Together with 924999991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (924999983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 462499994 + 462499995.

It is an arithmetic number, because the mean of its divisors is an integer number (462499995).

Almost surely, 2^924999989 is an apocalyptic number.

It is an amenable number.

924999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

924999989 is an equidigital number, since it uses as much as digits as its factorization.

924999989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34012224, while the sum is 68.

The square root of 924999989 is about 30413.8124706522. The cubic root of 924999989 is about 974.3475763251.

The spelling of 924999989 in words is "nine hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred eighty-nine".