620019161929 has 4 divisors (see below), whose sum is σ = 641399133060. Its totient is φ = 598639190800.

The previous prime is 620019161891. The next prime is 620019161959. The reversal of 620019161929 is 929161910026.

It is a happy number.

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 386293325625 + 233725836304 = 621525^2 + 483452^2 .

It is a cyclic number.

It is not a de Polignac number, because 620019161929 - 2¹⁷ = 620019030857 is a prime.

It is a super-2 number, since 2×620019161929² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620019161959) 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, 10689985522 + ... + 10689985579.

It is an arithmetic number, because the mean of its divisors is an integer number (160349783265).

Almost surely, 2^620019161929 is an apocalyptic number.

It is an amenable number.

620019161929 is a deficient number, since it is larger than the sum of its proper divisors (21379971131).

620019161929 is a wasteful number, since it uses less digits than its factorization.

620019161929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21379971130.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 620019161929 in words is "six hundred twenty billion, nineteen million, one hundred sixty-one thousand, nine hundred twenty-nine".