620347449 has 8 divisors (see below), whose sum is σ = 834718720. Its totient is φ = 409770576.

The previous prime is 620347433. The next prime is 620347451. The reversal of 620347449 is 944743026.

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

It is not a de Polignac number, because 620347449 - 2⁴ = 620347433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (620347499) 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, 948217 + ... + 948870.

It is an arithmetic number, because the mean of its divisors is an integer number (104339840).

Almost surely, 2^620347449 is an apocalyptic number.

It is an amenable number.

620347449 is a deficient number, since it is larger than the sum of its proper divisors (214371271).

620347449 is a wasteful number, since it uses less digits than its factorization.

620347449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897199.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 620347449 is about 24906.7751625938. The cubic root of 620347449 is about 852.8611537559.

The spelling of 620347449 in words is "six hundred twenty million, three hundred forty-seven thousand, four hundred forty-nine".