620461757 has 8 divisors (see below), whose sum is σ = 642151800. Its totient is φ = 598791424.

The previous prime is 620461753. The next prime is 620461771. The reversal of 620461757 is 757164026.

It can be written as a sum of positive squares in 4 ways, for example, as 341103961 + 279357796 = 18469^2 + 16714^2 .

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 620461757 - 2² = 620461753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620461757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620461753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91169 + ... + 97737.

It is an arithmetic number, because the mean of its divisors is an integer number (80268975).

Almost surely, 2^620461757 is an apocalyptic number.

It is an amenable number.

620461757 is a deficient number, since it is larger than the sum of its proper divisors (21690043).

620461757 is a wasteful number, since it uses less digits than its factorization.

620461757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9855.

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

The square root of 620461757 is about 24909.0697738796. The cubic root of 620461757 is about 852.9135345444.

The spelling of 620461757 in words is "six hundred twenty million, four hundred sixty-one thousand, seven hundred fifty-seven".