77328469 has 2 divisors, whose sum is σ = 77328470. Its totient is φ = 77328468.

The previous prime is 77328457. The next prime is 77328479. The reversal of 77328469 is 96482377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72897444 + 4431025 = 8538^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 77328469 - 2¹³ = 77320277 is a prime.

It is a super-2 number, since 2×77328469² = 11959384235767922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77328479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38664234 + 38664235.

It is an arithmetic number, because the mean of its divisors is an integer number (38664235).

Almost surely, 2^77328469 is an apocalyptic number.

It is an amenable number.

77328469 is a deficient number, since it is larger than the sum of its proper divisors (1).

77328469 is an equidigital number, since it uses as much as digits as its factorization.

77328469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 77328469 is about 8793.6607280472. The cubic root of 77328469 is about 426.0361688379.

The spelling of 77328469 in words is "seventy-seven million, three hundred twenty-eight thousand, four hundred sixty-nine".