79061669 has 2 divisors, whose sum is σ = 79061670. Its totient is φ = 79061668.

The previous prime is 79061663. The next prime is 79061753. The reversal of 79061669 is 96616097.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58721569 + 20340100 = 7663^2 + 4510^2 .

It is an emirp because it is prime and its reverse (96616097) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79061669 is a prime.

It is a super-2 number, since 2×79061669² = 12501495010131122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79061663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39530834 + 39530835.

It is an arithmetic number, because the mean of its divisors is an integer number (39530835).

Almost surely, 2^79061669 is an apocalyptic number.

It is an amenable number.

79061669 is a deficient number, since it is larger than the sum of its proper divisors (1).

79061669 is an equidigital number, since it uses as much as digits as its factorization.

79061669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 79061669 is about 8891.6628928452. The cubic root of 79061669 is about 429.1956642277.

The spelling of 79061669 in words is "seventy-nine million, sixty-one thousand, six hundred sixty-nine".