620138747293 has 8 divisors (see below), whose sum is σ = 680442515928. Its totient is φ = 561635091264.

The previous prime is 620138747281. The next prime is 620138747299. The reversal of 620138747293 is 392747831026.

It can be written as a sum of positive squares in 4 ways, for example, as 208690907929 + 411447839364 = 456827^2 + 641442^2 .

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

It is not a de Polignac number, because 620138747293 - 2⁹ = 620138746781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620138747293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620138747299) 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, 450027430 + ... + 450028807.

It is an arithmetic number, because the mean of its divisors is an integer number (85055314491).

Almost surely, 2^620138747293 is an apocalyptic number.

It is an amenable number.

620138747293 is a deficient number, since it is larger than the sum of its proper divisors (60303768635).

620138747293 is a wasteful number, since it uses less digits than its factorization.

620138747293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900056303.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 620138747293 in words is "six hundred twenty billion, one hundred thirty-eight million, seven hundred forty-seven thousand, two hundred ninety-three".