620761 has 4 divisors (see below), whose sum is σ = 625024. Its totient is φ = 616500.

The previous prime is 620759. The next prime is 620771. The reversal of 620761 is 167026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620761 - 2¹ = 620759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (156256).

2⁶²⁰⁷⁶¹ is an apocalyptic number.

It is an amenable number.

620761 is a deficient number, since it is larger than the sum of its proper divisors (4263).

620761 is a wasteful number, since it uses less digits than its factorization.

620761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 620761 is about 787.8838746922. The cubic root of 620761 is about 85.3050629958.

Adding to 620761 its reverse (167026), we get a palindrome (787787).

The spelling of 620761 in words is "six hundred twenty thousand, seven hundred sixty-one".