989250121 has 2 divisors, whose sum is σ = 989250122. Its totient is φ = 989250120.

The previous prime is 989250113. The next prime is 989250127. The reversal of 989250121 is 121052989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815959225 + 173290896 = 28565^2 + 13164^2 .

It is a cyclic number.

It is not a de Polignac number, because 989250121 - 2³ = 989250113 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is equal to p_50328568 and since 989250121 and 50328568 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (989250127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494625060 + 494625061.

It is an arithmetic number, because the mean of its divisors is an integer number (494625061).

Almost surely, 2^989250121 is an apocalyptic number.

It is an amenable number.

989250121 is a deficient number, since it is larger than the sum of its proper divisors (1).

989250121 is an equidigital number, since it uses as much as digits as its factorization.

989250121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 989250121 is about 31452.3468281780. The cubic root of 989250121 is about 996.4037897750.

The spelling of 989250121 in words is "nine hundred eighty-nine million, two hundred fifty thousand, one hundred twenty-one".