620403601 has 2 divisors, whose sum is σ = 620403602. Its totient is φ = 620403600.

The previous prime is 620403569. The next prime is 620403673. The reversal of 620403601 is 106304026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 576048001 + 44355600 = 24001^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 620403601 - 2⁵ = 620403569 is a prime.

It is not a weakly prime, because it can be changed into another prime (620403691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310201800 + 310201801.

It is an arithmetic number, because the mean of its divisors is an integer number (310201801).

Almost surely, 2^620403601 is an apocalyptic number.

It is an amenable number.

620403601 is a deficient number, since it is larger than the sum of its proper divisors (1).

620403601 is an equidigital number, since it uses as much as digits as its factorization.

620403601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 620403601 is about 24907.9023805699. The cubic root of 620403601 is about 852.8868857951.

Adding to 620403601 its reverse (106304026), we get a palindrome (726707627).

The spelling of 620403601 in words is "six hundred twenty million, four hundred three thousand, six hundred one".