620229961 has 8 divisors (see below), whose sum is σ = 668480904. Its totient is φ = 572056320.

The previous prime is 620229959. The next prime is 620229971. The reversal of 620229961 is 169922026.

It can be written as a sum of positive squares in 4 ways, for example, as 83612736 + 536617225 = 9144^2 + 23165^2 .

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 620229961 - 2¹ = 620229959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620229961.

It is not an unprimeable number, because it can be changed into a prime (620229971) 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, 2080 + ... + 35281.

It is an arithmetic number, because the mean of its divisors is an integer number (83560113).

Almost surely, 2^620229961 is an apocalyptic number.

It is an amenable number.

620229961 is a deficient number, since it is larger than the sum of its proper divisors (48250943).

620229961 is a wasteful number, since it uses less digits than its factorization.

620229961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38651.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 620229961 is about 24904.4164958748. The cubic root of 620229961 is about 852.8073090501.

It can be divided in two parts, 6202 and 29961, that added together give a palindrome (36163).

The spelling of 620229961 in words is "six hundred twenty million, two hundred twenty-nine thousand, nine hundred sixty-one".