73678769 has 2 divisors, whose sum is σ = 73678770. Its totient is φ = 73678768.

The previous prime is 73678747. The next prime is 73678777. The reversal of 73678769 is 96787637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62220544 + 11458225 = 7888^2 + 3385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73678769 is a prime.

It is a super-2 number, since 2×73678769² = 10857122002710722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73678769.

It is not a weakly prime, because it can be changed into another prime (73678069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36839384 + 36839385.

It is an arithmetic number, because the mean of its divisors is an integer number (36839385).

Almost surely, 2^73678769 is an apocalyptic number.

It is an amenable number.

73678769 is a deficient number, since it is larger than the sum of its proper divisors (1).

73678769 is an equidigital number, since it uses as much as digits as its factorization.

73678769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 53.

The square root of 73678769 is about 8583.6337876217. The cubic root of 73678769 is about 419.2252706083.

It can be divided in two parts, 73678 and 769, that added together give a palindrome (74447).

The spelling of 73678769 in words is "seventy-three million, six hundred seventy-eight thousand, seven hundred sixty-nine".