628769269 has 2 divisors, whose sum is σ = 628769270. Its totient is φ = 628769268.

The previous prime is 628769237. The next prime is 628769287. The reversal of 628769269 is 962967826.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488631025 + 140138244 = 22105^2 + 11838^2 .

It is a cyclic number.

It is not a de Polignac number, because 628769269 - 2⁵ = 628769237 is a prime.

It is a super-2 number, since 2×628769269² = 790701587277588722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628769209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314384634 + 314384635.

It is an arithmetic number, because the mean of its divisors is an integer number (314384635).

Almost surely, 2^628769269 is an apocalyptic number.

It is an amenable number.

628769269 is a deficient number, since it is larger than the sum of its proper divisors (1).

628769269 is an equidigital number, since it uses as much as digits as its factorization.

628769269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The square root of 628769269 is about 25075.2720623326. The cubic root of 628769269 is about 856.7032921672.

The spelling of 628769269 in words is "six hundred twenty-eight million, seven hundred sixty-nine thousand, two hundred sixty-nine".