620601577 has 4 divisors (see below), whose sum is σ = 621210436. Its totient is φ = 619992720.

The previous prime is 620601563. The next prime is 620601581. The reversal of 620601577 is 775106026.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178382736 + 442218841 = 13356^2 + 21029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620601577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620601517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302898 + ... + 304939.

It is an arithmetic number, because the mean of its divisors is an integer number (155302609).

Almost surely, 2^620601577 is an apocalyptic number.

It is an amenable number.

620601577 is a deficient number, since it is larger than the sum of its proper divisors (608859).

620601577 is a wasteful number, since it uses less digits than its factorization.

620601577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608858.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 620601577 is about 24911.8762240021. The cubic root of 620601577 is about 852.9775972698.

The spelling of 620601577 in words is "six hundred twenty million, six hundred one thousand, five hundred seventy-seven".