620431 has 8 divisors (see below), whose sum is σ = 721184. Its totient is φ = 522720.

The previous prime is 620429. The next prime is 620437. The reversal of 620431 is 134026.

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 620431 - 2¹ = 620429 is a prime.

It is a super-2 number, since 2×620431² = 769869251522, which contains 22 as substring.

It is a Duffinian number.

620431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620437) 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, 300 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (90148).

2⁶²⁰⁴³¹ is an apocalyptic number.

620431 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

620431 is a deficient number, since it is larger than the sum of its proper divisors (100753).

620431 is a wasteful number, since it uses less digits than its factorization.

620431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 620431 is about 787.6744251275. The cubic root of 620431 is about 85.2899441011.

Adding to 620431 its reverse (134026), we get a palindrome (754457).

The spelling of 620431 in words is "six hundred twenty thousand, four hundred thirty-one".