677138069 has 2 divisors, whose sum is σ = 677138070. Its totient is φ = 677138068.

The previous prime is 677138057. The next prime is 677138087. The reversal of 677138069 is 960831776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 593507044 + 83631025 = 24362^2 + 9145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677138069 is a prime.

It is a super-2 number, since 2×677138069² = 917031928978097522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677138269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338569034 + 338569035.

It is an arithmetic number, because the mean of its divisors is an integer number (338569035).

Almost surely, 2^677138069 is an apocalyptic number.

It is an amenable number.

677138069 is a deficient number, since it is larger than the sum of its proper divisors (1).

677138069 is an equidigital number, since it uses as much as digits as its factorization.

677138069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 677138069 is about 26021.8767386213. The cubic root of 677138069 is about 878.1305307149.

The spelling of 677138069 in words is "six hundred seventy-seven million, one hundred thirty-eight thousand, sixty-nine".