670129769 has 2 divisors, whose sum is σ = 670129770. Its totient is φ = 670129768.

The previous prime is 670129741. The next prime is 670129781. The reversal of 670129769 is 967921076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502297744 + 167832025 = 22412^2 + 12955^2 .

It is a cyclic number.

It is not a de Polignac number, because 670129769 - 2¹⁶ = 670064233 is a prime.

It is a super-2 number, since 2×670129769² = 898147814599986722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670149769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335064884 + 335064885.

It is an arithmetic number, because the mean of its divisors is an integer number (335064885).

Almost surely, 2^670129769 is an apocalyptic number.

It is an amenable number.

670129769 is a deficient number, since it is larger than the sum of its proper divisors (1).

670129769 is an equidigital number, since it uses as much as digits as its factorization.

670129769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 670129769 is about 25886.8647966493. The cubic root of 670129769 is about 875.0905023124.

The spelling of 670129769 in words is "six hundred seventy million, one hundred twenty-nine thousand, seven hundred sixty-nine".