679142077 has 2 divisors, whose sum is σ = 679142078. Its totient is φ = 679142076.

The previous prime is 679142071. The next prime is 679142117. The reversal of 679142077 is 770241976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646125561 + 33016516 = 25419^2 + 5746^2 .

It is a cyclic number.

It is not a de Polignac number, because 679142077 - 2¹¹ = 679140029 is a prime.

It is a super-2 number, since 2×679142077² = 922467921503747858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679142071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339571038 + 339571039.

It is an arithmetic number, because the mean of its divisors is an integer number (339571039).

Almost surely, 2^679142077 is an apocalyptic number.

It is an amenable number.

679142077 is a deficient number, since it is larger than the sum of its proper divisors (1).

679142077 is an equidigital number, since it uses as much as digits as its factorization.

679142077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 679142077 is about 26060.3545064145. The cubic root of 679142077 is about 878.9959610207.

The spelling of 679142077 in words is "six hundred seventy-nine million, one hundred forty-two thousand, seventy-seven".