601698989 has 4 divisors (see below), whose sum is σ = 622447260. Its totient is φ = 580950720.

The previous prime is 601698971. The next prime is 601699019. The reversal of 601698989 is 989896106.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989896106 = 2 ⋅494948053.

It can be written as a sum of positive squares in 2 ways, for example, as 141253225 + 460445764 = 11885^2 + 21458^2 .

It is a cyclic number.

It is not a de Polignac number, because 601698989 - 2⁸ = 601698733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601698919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10374092 + ... + 10374149.

It is an arithmetic number, because the mean of its divisors is an integer number (155611815).

Almost surely, 2^601698989 is an apocalyptic number.

It is an amenable number.

601698989 is a deficient number, since it is larger than the sum of its proper divisors (20748271).

601698989 is a wasteful number, since it uses less digits than its factorization.

601698989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20748270.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 601698989 is about 24529.5533795461. The cubic root of 601698989 is about 844.2280166221.

The spelling of 601698989 in words is "six hundred one million, six hundred ninety-eight thousand, nine hundred eighty-nine".