620191 has 8 divisors (see below), whose sum is σ = 728784. Its totient is φ = 520320.

The previous prime is 620183. The next prime is 620197. The reversal of 620191 is 191026.

620191 = 319² + 320² + ... + 324².

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 620191 - 2³ = 620183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2026 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (91098).

2⁶²⁰¹⁹¹ is an apocalyptic number.

620191 is a deficient number, since it is larger than the sum of its proper divisors (108593).

620191 is a wasteful number, since it uses less digits than its factorization.

620191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 620191 is about 787.5220631830. The cubic root of 620191 is about 85.2789451737.

The spelling of 620191 in words is "six hundred twenty thousand, one hundred ninety-one".