621471607 has 2 divisors, whose sum is σ = 621471608. Its totient is φ = 621471606.

The previous prime is 621471559. The next prime is 621471623. The reversal of 621471607 is 706174126.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621471607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621471007) 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, 310735803 + 310735804.

It is an arithmetic number, because the mean of its divisors is an integer number (310735804).

Almost surely, 2^621471607 is an apocalyptic number.

621471607 is a deficient number, since it is larger than the sum of its proper divisors (1).

621471607 is an equidigital number, since it uses as much as digits as its factorization.

621471607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 621471607 is about 24929.3322614145. The cubic root of 621471607 is about 853.3760115407.

The spelling of 621471607 in words is "six hundred twenty-one million, four hundred seventy-one thousand, six hundred seven".