621409849 has 8 divisors (see below), whose sum is σ = 641797632. Its totient is φ = 601043520.

The previous prime is 621409807. The next prime is 621409853. The reversal of 621409849 is 948904126.

621409849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621409849 - 2⁹ = 621409337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621409049) 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, 70977 + ... + 79249.

It is an arithmetic number, because the mean of its divisors is an integer number (80224704).

Almost surely, 2^621409849 is an apocalyptic number.

It is an amenable number.

621409849 is a deficient number, since it is larger than the sum of its proper divisors (20387783).

621409849 is a wasteful number, since it uses less digits than its factorization.

621409849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10727.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 621409849 is about 24928.0935693045. The cubic root of 621409849 is about 853.3477428631.

The spelling of 621409849 in words is "six hundred twenty-one million, four hundred nine thousand, eight hundred forty-nine".