1985009613 has 8 divisors (see below), whose sum is σ = 2646950400. Its totient is φ = 1323204288.

The previous prime is 1985009597. The next prime is 1985009617. The reversal of 1985009613 is 3169005891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1985009613 - 2⁴ = 1985009597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985009617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7573 + ... + 63461.

It is an arithmetic number, because the mean of its divisors is an integer number (330868800).

Almost surely, 2^1985009613 is an apocalyptic number.

It is an amenable number.

1985009613 is a deficient number, since it is larger than the sum of its proper divisors (661940787).

1985009613 is a wasteful number, since it uses less digits than its factorization.

1985009613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67731.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1985009613 is about 44553.4467016863. The cubic root of 1985009613 is about 1256.7653685449.

The spelling of 1985009613 in words is "one billion, nine hundred eighty-five million, nine thousand, six hundred thirteen".