974999989 has 2 divisors, whose sum is σ = 974999990. Its totient is φ = 974999988.

The previous prime is 974999959. The next prime is 974999999. The reversal of 974999989 is 989999479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964599364 + 10400625 = 31058^2 + 3225^2 .

It is a cyclic number.

It is not a de Polignac number, because 974999989 - 2¹⁹ = 974475701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (974999939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487499994 + 487499995.

It is an arithmetic number, because the mean of its divisors is an integer number (487499995).

Almost surely, 2^974999989 is an apocalyptic number.

It is an amenable number.

974999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

974999989 is an equidigital number, since it uses as much as digits as its factorization.

974999989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119042784, while the sum is 73.

The square root of 974999989 is about 31224.9898158510. The cubic root of 974999989 is about 991.5962376113.

The spelling of 974999989 in words is "nine hundred seventy-four million, nine hundred ninety-nine thousand, nine hundred eighty-nine".