620689012 has 6 divisors (see below), whose sum is σ = 1086205778. Its totient is φ = 310344504.

The previous prime is 620688967. The next prime is 620689019. The reversal of 620689012 is 210986026.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 450543076 + 170145936 = 21226^2 + 13044^2 .

It is a super-2 number, since 2×620689012² = 770509699235072288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620689019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77586123 + ... + 77586130.

Almost surely, 2^620689012 is an apocalyptic number.

It is an amenable number.

620689012 is a deficient number, since it is larger than the sum of its proper divisors (465516766).

620689012 is a wasteful number, since it uses less digits than its factorization.

620689012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155172257 (or 155172255 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 620689012 is about 24913.6310480829. The cubic root of 620689012 is about 853.0176533470.

The spelling of 620689012 in words is "six hundred twenty million, six hundred eighty-nine thousand, twelve".