620454551 has 2 divisors, whose sum is σ = 620454552. Its totient is φ = 620454550.

The previous prime is 620454539. The next prime is 620454589. The reversal of 620454551 is 155454026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620454551 - 2¹⁰ = 620453527 is a prime.

It is a super-2 number, since 2×620454551² = 769927699713223202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620454451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310227275 + 310227276.

It is an arithmetic number, because the mean of its divisors is an integer number (310227276).

Almost surely, 2^620454551 is an apocalyptic number.

620454551 is a deficient number, since it is larger than the sum of its proper divisors (1).

620454551 is an equidigital number, since it uses as much as digits as its factorization.

620454551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 620454551 is about 24908.9251273514. The cubic root of 620454551 is about 852.9102326386.

The spelling of 620454551 in words is "six hundred twenty million, four hundred fifty-four thousand, five hundred fifty-one".