620649151 has 2 divisors, whose sum is σ = 620649152. Its totient is φ = 620649150.

The previous prime is 620649149. The next prime is 620649173. The reversal of 620649151 is 151946026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620649151 - 2¹ = 620649149 is a prime.

Together with 620649149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620649191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310324575 + 310324576.

It is an arithmetic number, because the mean of its divisors is an integer number (310324576).

Almost surely, 2^620649151 is an apocalyptic number.

620649151 is a deficient number, since it is larger than the sum of its proper divisors (1).

620649151 is an equidigital number, since it uses as much as digits as its factorization.

620649151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 620649151 is about 24912.8310514883. The cubic root of 620649151 is about 852.9993925304. Note that the first 3 decimals are identical.

The spelling of 620649151 in words is "six hundred twenty million, six hundred forty-nine thousand, one hundred fifty-one".