5211207989 has 4 divisors (see below), whose sum is σ = 5612070156. Its totient is φ = 4810345824.

The previous prime is 5211207971. The next prime is 5211208001. The reversal of 5211207989 is 9897021125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 666156100 + 4545051889 = 25810^2 + 67417^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211207989 - 2³² = 916240693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211207929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200431064 + ... + 200431089.

It is an arithmetic number, because the mean of its divisors is an integer number (1403017539).

Almost surely, 2^5211207989 is an apocalyptic number.

It is an amenable number.

5211207989 is a deficient number, since it is larger than the sum of its proper divisors (400862167).

5211207989 is a wasteful number, since it uses less digits than its factorization.

5211207989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400862166.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 5211207989 is about 72188.6971000308. The cubic root of 5211207989 is about 1733.7220352091.

The spelling of 5211207989 in words is "five billion, two hundred eleven million, two hundred seven thousand, nine hundred eighty-nine".