620194861 has 8 divisors (see below), whose sum is σ = 728620704. Its totient is φ = 520443120.

The previous prime is 620194853. The next prime is 620194873. The reversal of 620194861 is 168491026.

It is a happy number.

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 620194861 - 2³ = 620194853 is a prime.

It is a super-2 number, since 2×620194861² = 769283331221618642, which contains 22 as substring.

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 620194861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620194801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168371 + ... + 2168656.

It is an arithmetic number, because the mean of its divisors is an integer number (91077588).

Almost surely, 2^620194861 is an apocalyptic number.

It is an amenable number.

620194861 is a deficient number, since it is larger than the sum of its proper divisors (108425843).

620194861 is a wasteful number, since it uses less digits than its factorization.

620194861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337051.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 620194861 is about 24903.7117916185. The cubic root of 620194861 is about 852.7912214143.

It can be divided in two parts, 620194 and 861, that added together give a triangular number (621055 = T₁₁₁₄).

The spelling of 620194861 in words is "six hundred twenty million, one hundred ninety-four thousand, eight hundred sixty-one".