628887379 has 2 divisors, whose sum is σ = 628887380. Its totient is φ = 628887378.

The previous prime is 628887361. The next prime is 628887437. The reversal of 628887379 is 973788826.

It is an a-pointer prime, because the next prime (628887437) can be obtained adding 628887379 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628887379 - 2¹³ = 628879187 is a prime.

It is not a weakly prime, because it can be changed into another prime (628887349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314443689 + 314443690.

It is an arithmetic number, because the mean of its divisors is an integer number (314443690).

Almost surely, 2^628887379 is an apocalyptic number.

628887379 is a deficient number, since it is larger than the sum of its proper divisors (1).

628887379 is an equidigital number, since it uses as much as digits as its factorization.

628887379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 58.

The square root of 628887379 is about 25077.6270607887. The cubic root of 628887379 is about 856.7569307571.

The spelling of 628887379 in words is "six hundred twenty-eight million, eight hundred eighty-seven thousand, three hundred seventy-nine".