620321407 has 8 divisors (see below), whose sum is σ = 624153600. Its totient is φ = 616496760.

The previous prime is 620321389. The next prime is 620321411. The reversal of 620321407 is 704123026.

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 620321407 - 2²⁷ = 486103679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620321447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299658 + ... + 301720.

It is an arithmetic number, because the mean of its divisors is an integer number (78019200).

Almost surely, 2^620321407 is an apocalyptic number.

620321407 is a deficient number, since it is larger than the sum of its proper divisors (3832193).

620321407 is a wasteful number, since it uses less digits than its factorization.

620321407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 620321407 is about 24906.2523676285. The cubic root of 620321407 is about 852.8492193037.

The spelling of 620321407 in words is "six hundred twenty million, three hundred twenty-one thousand, four hundred seven".