620275261 has 4 divisors (see below), whose sum is σ = 620328124. Its totient is φ = 620222400.

The previous prime is 620275259. The next prime is 620275283. The reversal of 620275261 is 162572026.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 136539225 + 483736036 = 11685^2 + 21994^2 .

It is a cyclic number.

It is not a de Polignac number, because 620275261 - 2¹ = 620275259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620275211) 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, 60 + ... + 35221.

It is an arithmetic number, because the mean of its divisors is an integer number (155082031).

Almost surely, 2^620275261 is an apocalyptic number.

It is an amenable number.

620275261 is a deficient number, since it is larger than the sum of its proper divisors (52863).

620275261 is a wasteful number, since it uses less digits than its factorization.

620275261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52862.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 620275261 is about 24905.3259565098. The cubic root of 620275261 is about 852.8280708283.

The spelling of 620275261 in words is "six hundred twenty million, two hundred seventy-five thousand, two hundred sixty-one".