97777769 has 2 divisors, whose sum is σ = 97777770. Its totient is φ = 97777768.

The previous prime is 97777759. The next prime is 97777783. The reversal of 97777769 is 96777779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97515625 + 262144 = 9875^2 + 512^2 .

It is a cyclic number.

It is not a de Polignac number, because 97777769 - 2⁸ = 97777513 is a prime.

It is a super-2 number, since 2×97777769² = 19120984221234722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97777759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48888884 + 48888885.

It is an arithmetic number, because the mean of its divisors is an integer number (48888885).

Almost surely, 2^97777769 is an apocalyptic number.

It is an amenable number.

97777769 is a deficient number, since it is larger than the sum of its proper divisors (1).

97777769 is an equidigital number, since it uses as much as digits as its factorization.

97777769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8168202, while the sum is 59.

The square root of 97777769 is about 9888.2642056126. The cubic root of 97777769 is about 460.6948682148.

The spelling of 97777769 in words is "ninety-seven million, seven hundred seventy-seven thousand, seven hundred sixty-nine".