620747783 has 2 divisors, whose sum is σ = 620747784. Its totient is φ = 620747782.

The previous prime is 620747737. The next prime is 620747807. The reversal of 620747783 is 387747026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620747783 - 2¹⁶ = 620682247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620747723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310373891 + 310373892.

It is an arithmetic number, because the mean of its divisors is an integer number (310373892).

Almost surely, 2^620747783 is an apocalyptic number.

620747783 is a deficient number, since it is larger than the sum of its proper divisors (1).

620747783 is an equidigital number, since it uses as much as digits as its factorization.

620747783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 620747783 is about 24914.8105150330. The cubic root of 620747783 is about 853.0445756421.

The spelling of 620747783 in words is "six hundred twenty million, seven hundred forty-seven thousand, seven hundred eighty-three".