620776907 has 2 divisors, whose sum is σ = 620776908. Its totient is φ = 620776906.

The previous prime is 620776903. The next prime is 620776963. The reversal of 620776907 is 709677026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620776907 - 2² = 620776903 is a prime.

It is not a weakly prime, because it can be changed into another prime (620776903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310388453 + 310388454.

It is an arithmetic number, because the mean of its divisors is an integer number (310388454).

Almost surely, 2^620776907 is an apocalyptic number.

620776907 is a deficient number, since it is larger than the sum of its proper divisors (1).

620776907 is an equidigital number, since it uses as much as digits as its factorization.

620776907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 620776907 is about 24915.3949798112. The cubic root of 620776907 is about 853.0579163700.

The spelling of 620776907 in words is "six hundred twenty million, seven hundred seventy-six thousand, nine hundred seven".