620669954 has 8 divisors (see below), whose sum is σ = 934868748. Its totient is φ = 309047040.

The previous prime is 620669953. The next prime is 620669963. The reversal of 620669954 is 459966026.

It can be written as a sum of positive squares in 2 ways, for example, as 616777225 + 3892729 = 24835^2 + 1973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 620669899 and 620669908.

It is not an unprimeable number, because it can be changed into a prime (620669953) 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, 643367 + ... + 644330.

Almost surely, 2^620669954 is an apocalyptic number.

620669954 is a deficient number, since it is larger than the sum of its proper divisors (314198794).

620669954 is a wasteful number, since it uses less digits than its factorization.

620669954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287940.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 620669954 is about 24913.2485637662. The cubic root of 620669954 is about 853.0089227393.

The spelling of 620669954 in words is "six hundred twenty million, six hundred sixty-nine thousand, nine hundred fifty-four".