620012709 has 12 divisors (see below), whose sum is σ = 912472236. Its totient is φ = 405542592.

The previous prime is 620012699. The next prime is 620012711. The reversal of 620012709 is 907210026.

It can be written as a sum of positive squares in 2 ways, for example, as 455609025 + 164403684 = 21345^2 + 12822^2 .

It is not a de Polignac number, because 620012709 - 2⁸ = 620012453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620012749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 649432 + ... + 650385.

It is an arithmetic number, because the mean of its divisors is an integer number (76039353).

Almost surely, 2^620012709 is an apocalyptic number.

It is an amenable number.

620012709 is a deficient number, since it is larger than the sum of its proper divisors (292459527).

620012709 is a wasteful number, since it uses less digits than its factorization.

620012709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299876 (or 1299873 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 620012709 is about 24900.0543975309. The cubic root of 620012709 is about 852.7077246262.

The spelling of 620012709 in words is "six hundred twenty million, twelve thousand, seven hundred nine".