620407 has 4 divisors (see below), whose sum is σ = 653080. Its totient is φ = 587736.

The previous prime is 620401. The next prime is 620413. The reversal of 620407 is 704026.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (620401) and next prime (620413).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 32653 = 620407 / (6 + 2 + 0 + 4 + 0 + 7).

It is a Duffinian number.

620407 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620401) 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, 16308 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (163270).

2⁶²⁰⁴⁰⁷ is an apocalyptic number.

620407 is a deficient number, since it is larger than the sum of its proper divisors (32673).

620407 is a wasteful number, since it uses less digits than its factorization.

620407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32672.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 620407 is about 787.6591902593. The cubic root of 620407 is about 85.2888443360.

The spelling of 620407 in words is "six hundred twenty thousand, four hundred seven".