621650426 has 4 divisors (see below), whose sum is σ = 932475642. Its totient is φ = 310825212.

The previous prime is 621650411. The next prime is 621650429. The reversal of 621650426 is 624056126.

621650426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624056126 = 2 ⋅312028063.

It can be written as a sum of positive squares in only one way, i.e., 568870201 + 52780225 = 23851^2 + 7265^2 .

It is a junction number, because it is equal to n+sod(n) for n = 621650392 and 621650401.

It is not an unprimeable number, because it can be changed into a prime (621650429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155412605 + ... + 155412608.

Almost surely, 2^621650426 is an apocalyptic number.

621650426 is a deficient number, since it is larger than the sum of its proper divisors (310825216).

621650426 is a wasteful number, since it uses less digits than its factorization.

621650426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310825215.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 621650426 is about 24932.9185215049. The cubic root of 621650426 is about 853.4578523465.

The spelling of 621650426 in words is "six hundred twenty-one million, six hundred fifty thousand, four hundred twenty-six".