620746917013 has 4 divisors (see below), whose sum is σ = 620749317708. Its totient is φ = 620744516320.

The previous prime is 620746916989. The next prime is 620746917017. The reversal of 620746917013 is 310719647026.

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 435069521604 + 185677395409 = 659598^2 + 430903^2 .

It is a cyclic number.

It is not a de Polignac number, because 620746917013 - 2⁵ = 620746916981 is a prime.

It is a super-2 number, since 2×620746917013² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620746917017) 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, 758206 + ... + 1347727.

It is an arithmetic number, because the mean of its divisors is an integer number (155187329427).

Almost surely, 2^620746917013 is an apocalyptic number.

It is an amenable number.

620746917013 is a deficient number, since it is larger than the sum of its proper divisors (2400695).

620746917013 is a wasteful number, since it uses less digits than its factorization.

620746917013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400694.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 620746917013 in words is "six hundred twenty billion, seven hundred forty-six million, nine hundred seventeen thousand, thirteen".