1639217013 has 16 divisors (see below), whose sum is σ = 2498618880. Its totient is φ = 936408816.

The previous prime is 1639217009. The next prime is 1639217033. The reversal of 1639217013 is 3107129361.

It is not a de Polignac number, because 1639217013 - 2² = 1639217009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639217033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72058 + ... + 92036.

It is an arithmetic number, because the mean of its divisors is an integer number (156163680).

Almost surely, 2^1639217013 is an apocalyptic number.

It is an amenable number.

1639217013 is a deficient number, since it is larger than the sum of its proper divisors (859401867).

1639217013 is a wasteful number, since it uses less digits than its factorization.

1639217013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23896.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1639217013 is about 40487.2450655759. The cubic root of 1639217013 is about 1179.0860041388.

The spelling of 1639217013 in words is "one billion, six hundred thirty-nine million, two hundred seventeen thousand, thirteen".