621462449 has 4 divisors (see below), whose sum is σ = 631650420. Its totient is φ = 611274480.

The previous prime is 621462433. The next prime is 621462451. The reversal of 621462449 is 944264126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7661824 + 613800625 = 2768^2 + 24775^2 .

It is a cyclic number.

It is not a de Polignac number, because 621462449 - 2⁴ = 621462433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621462409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5093894 + ... + 5094015.

It is an arithmetic number, because the mean of its divisors is an integer number (157912605).

Almost surely, 2^621462449 is an apocalyptic number.

It is an amenable number.

621462449 is a deficient number, since it is larger than the sum of its proper divisors (10187971).

621462449 is a wasteful number, since it uses less digits than its factorization.

621462449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10187970.

The product of its digits is 82944, while the sum is 38.

The square root of 621462449 is about 24929.1485815300. The cubic root of 621462449 is about 853.3718197397.

The spelling of 621462449 in words is "six hundred twenty-one million, four hundred sixty-two thousand, four hundred forty-nine".