620137 has 4 divisors (see below), whose sum is σ = 708736. Its totient is φ = 531540.

The previous prime is 620117. The next prime is 620159. The reversal of 620137 is 731026.

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, and also an emirpimes, since its reverse is a distinct semiprime: 731026 = 2 ⋅365513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620137 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (620117) 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, 44289 + ... + 44302.

It is an arithmetic number, because the mean of its divisors is an integer number (177184).

2⁶²⁰¹³⁷ is an apocalyptic number.

It is an amenable number.

620137 is a deficient number, since it is larger than the sum of its proper divisors (88599).

620137 is an equidigital number, since it uses as much as digits as its factorization.

620137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88598.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 620137 is about 787.4877776829. The cubic root of 620137 is about 85.2764700240.

Subtracting 620137 from its reverse (731026), we obtain a square (110889 = 333²).

It can be divided in two parts, 620 and 137, that added together give a palindrome (757).

The spelling of 620137 in words is "six hundred twenty thousand, one hundred thirty-seven".