620757641 has 8 divisors (see below), whose sum is σ = 709760064. Its totient is φ = 531835920.

The previous prime is 620757637. The next prime is 620757647. The reversal of 620757641 is 146757026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620757641 - 2² = 620757637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620757595 and 620757604.

It is not an unprimeable number, because it can be changed into a prime (620757647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2675 + ... + 35336.

It is an arithmetic number, because the mean of its divisors is an integer number (88720008).

Almost surely, 2^620757641 is an apocalyptic number.

It is an amenable number.

620757641 is a deficient number, since it is larger than the sum of its proper divisors (89002423).

620757641 is a wasteful number, since it uses less digits than its factorization.

620757641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40351.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 620757641 is about 24915.0083483831. The cubic root of 620757641 is about 853.0490913081.

The spelling of 620757641 in words is "six hundred twenty million, seven hundred fifty-seven thousand, six hundred forty-one".