621470077 has 2 divisors, whose sum is σ = 621470078. Its totient is φ = 621470076.

The previous prime is 621470063. The next prime is 621470089. The reversal of 621470077 is 770074126.

621470077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 568631716 + 52838361 = 23846^2 + 7269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621470077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621473077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310735038 + 310735039.

It is an arithmetic number, because the mean of its divisors is an integer number (310735039).

Almost surely, 2^621470077 is an apocalyptic number.

It is an amenable number.

621470077 is a deficient number, since it is larger than the sum of its proper divisors (1).

621470077 is an equidigital number, since it uses as much as digits as its factorization.

621470077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 621470077 is about 24929.3015746531. The cubic root of 621470077 is about 853.3753112318.

The spelling of 621470077 in words is "six hundred twenty-one million, four hundred seventy thousand, seventy-seven".