60020909 has 4 divisors (see below), whose sum is σ = 64637916. Its totient is φ = 55403904.

The previous prime is 60020903. The next prime is 60020911. The reversal of 60020909 is 90902006.

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 8497225 + 51523684 = 2915^2 + 7178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60020909 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 (60020903) 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, 2308484 + ... + 2308509.

It is an arithmetic number, because the mean of its divisors is an integer number (16159479).

Almost surely, 2^60020909 is an apocalyptic number.

It is an amenable number.

60020909 is a deficient number, since it is larger than the sum of its proper divisors (4617007).

60020909 is a wasteful number, since it uses less digits than its factorization.

60020909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617006.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 60020909 is about 7747.3162449974. The cubic root of 60020909 is about 391.5322343729.

The spelling of 60020909 in words is "sixty million, twenty thousand, nine hundred nine".