628915379 has 2 divisors, whose sum is σ = 628915380. Its totient is φ = 628915378.

The previous prime is 628915327. The next prime is 628915387. The reversal of 628915379 is 973519826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628915379 - 2¹⁶ = 628849843 is a prime.

It is not a weakly prime, because it can be changed into another prime (628915579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314457689 + 314457690.

It is an arithmetic number, because the mean of its divisors is an integer number (314457690).

Almost surely, 2^628915379 is an apocalyptic number.

628915379 is a deficient number, since it is larger than the sum of its proper divisors (1).

628915379 is an equidigital number, since it uses as much as digits as its factorization.

628915379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 628915379 is about 25078.1853211113. The cubic root of 628915379 is about 856.7696457194.

The spelling of 628915379 in words is "six hundred twenty-eight million, nine hundred fifteen thousand, three hundred seventy-nine".