620091 has 6 divisors (see below), whose sum is σ = 895700. Its totient is φ = 413388.

The previous prime is 620051. The next prime is 620099. The reversal of 620091 is 190026.

It is not a de Polignac number, because 620091 - 2¹⁰ = 619067 is a prime.

It is a Duffinian number.

620091 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620091.

It is not an unprimeable number, because it can be changed into a prime (620099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34441 + ... + 34458.

2⁶²⁰⁰⁹¹ is an apocalyptic number.

620091 is a deficient number, since it is larger than the sum of its proper divisors (275609).

620091 is a wasteful number, since it uses less digits than its factorization.

620091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68905 (or 68902 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 620091 is about 787.4585703388. The cubic root of 620091 is about 85.2743614498.

The spelling of 620091 in words is "six hundred twenty thousand, ninety-one".