620661019 has 8 divisors (see below), whose sum is σ = 677913408. Its totient is φ = 563546760.

The previous prime is 620661017. The next prime is 620661023. The reversal of 620661019 is 910166026.

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

It is a cyclic number.

It is not a de Polignac number, because 620661019 - 2¹ = 620661017 is a prime.

It is a super-2 number, since 2×620661019² = 770440201012236722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620661017) 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, 25017 + ... + 43210.

It is an arithmetic number, because the mean of its divisors is an integer number (84739176).

Almost surely, 2^620661019 is an apocalyptic number.

620661019 is a deficient number, since it is larger than the sum of its proper divisors (57252389).

620661019 is a wasteful number, since it uses less digits than its factorization.

620661019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69065.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 620661019 is about 24913.0692408623. The cubic root of 620661019 is about 853.0048294896.

The spelling of 620661019 in words is "six hundred twenty million, six hundred sixty-one thousand, nineteen".