77047469 has 2 divisors, whose sum is σ = 77047470. Its totient is φ = 77047468.

The previous prime is 77047441. The next prime is 77047499. The reversal of 77047469 is 96474077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45832900 + 31214569 = 6770^2 + 5587^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77047469 is a prime.

It is a super-2 number, since 2×77047469² = 11872624958611922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77047409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38523734 + 38523735.

It is an arithmetic number, because the mean of its divisors is an integer number (38523735).

Almost surely, 2^77047469 is an apocalyptic number.

It is an amenable number.

77047469 is a deficient number, since it is larger than the sum of its proper divisors (1).

77047469 is an equidigital number, since it uses as much as digits as its factorization.

77047469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 77047469 is about 8777.6687679588. The cubic root of 77047469 is about 425.5194920839.

The spelling of 77047469 in words is "seventy-seven million, forty-seven thousand, four hundred sixty-nine".