630128377 has 2 divisors, whose sum is σ = 630128378. Its totient is φ = 630128376.

The previous prime is 630128339. The next prime is 630128383. The reversal of 630128377 is 773821036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487349776 + 142778601 = 22076^2 + 11949^2 .

It is a cyclic number.

It is not a de Polignac number, because 630128377 - 2⁷ = 630128249 is a prime.

It is a super-3 number, since 3×630128377³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (630128777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315064188 + 315064189.

It is an arithmetic number, because the mean of its divisors is an integer number (315064189).

Almost surely, 2^630128377 is an apocalyptic number.

It is an amenable number.

630128377 is a deficient number, since it is larger than the sum of its proper divisors (1).

630128377 is an equidigital number, since it uses as much as digits as its factorization.

630128377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 630128377 is about 25102.3579968098. The cubic root of 630128377 is about 857.3201132234.

The spelling of 630128377 in words is "six hundred thirty million, one hundred twenty-eight thousand, three hundred seventy-seven".