620236451 has 2 divisors, whose sum is σ = 620236452. Its totient is φ = 620236450.

The previous prime is 620236417. The next prime is 620236453. The reversal of 620236451 is 154632026.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620236451 is a prime.

It is a Sophie Germain prime.

Together with 620236453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620236453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310118225 + 310118226.

It is an arithmetic number, because the mean of its divisors is an integer number (310118226).

Almost surely, 2^620236451 is an apocalyptic number.

620236451 is a deficient number, since it is larger than the sum of its proper divisors (1).

620236451 is an equidigital number, since it uses as much as digits as its factorization.

620236451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 620236451 is about 24904.5467937082. The cubic root of 620236451 is about 852.8102835921.

Adding to 620236451 its reverse (154632026), we get a palindrome (774868477).

The spelling of 620236451 in words is "six hundred twenty million, two hundred thirty-six thousand, four hundred fifty-one".