620745451 has 2 divisors, whose sum is σ = 620745452. Its totient is φ = 620745450.

The previous prime is 620745449. The next prime is 620745469. The reversal of 620745451 is 154547026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620745451 - 2¹ = 620745449 is a prime.

Together with 620745449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (620745401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310372725 + 310372726.

It is an arithmetic number, because the mean of its divisors is an integer number (310372726).

Almost surely, 2^620745451 is an apocalyptic number.

620745451 is a deficient number, since it is larger than the sum of its proper divisors (1).

620745451 is an equidigital number, since it uses as much as digits as its factorization.

620745451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 620745451 is about 24914.7637155161. The cubic root of 620745451 is about 853.0435074131.

The spelling of 620745451 in words is "six hundred twenty million, seven hundred forty-five thousand, four hundred fifty-one".