620347641 has 4 divisors (see below), whose sum is σ = 827130192. Its totient is φ = 413565092.

The previous prime is 620347633. The next prime is 620347691. The reversal of 620347641 is 146743026.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620347641 - 2³ = 620347633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (620347691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103391271 + ... + 103391276.

It is an arithmetic number, because the mean of its divisors is an integer number (206782548).

Almost surely, 2^620347641 is an apocalyptic number.

It is an amenable number.

620347641 is a deficient number, since it is larger than the sum of its proper divisors (206782551).

620347641 is a wasteful number, since it uses less digits than its factorization.

620347641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206782550.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 620347641 is about 24906.7790169664. The cubic root of 620347641 is about 852.8612417439.

The spelling of 620347641 in words is "six hundred twenty million, three hundred forty-seven thousand, six hundred forty-one".