620954879 has 2 divisors, whose sum is σ = 620954880. Its totient is φ = 620954878.

The previous prime is 620954819. The next prime is 620954927. The reversal of 620954879 is 978459026.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620954879 - 2¹² = 620950783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620954809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310477439 + 310477440.

It is an arithmetic number, because the mean of its divisors is an integer number (310477440).

Almost surely, 2^620954879 is an apocalyptic number.

620954879 is a deficient number, since it is larger than the sum of its proper divisors (1).

620954879 is an equidigital number, since it uses as much as digits as its factorization.

620954879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 620954879 is about 24918.9662506293. The cubic root of 620954879 is about 853.1394303114.

The spelling of 620954879 in words is "six hundred twenty million, nine hundred fifty-four thousand, eight hundred seventy-nine".