77468869 has 2 divisors, whose sum is σ = 77468870. Its totient is φ = 77468868.

The previous prime is 77468863. The next prime is 77468957. The reversal of 77468869 is 96886477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 6066369 = 8450^2 + 2463^2 .

It is a cyclic number.

It is not a de Polignac number, because 77468869 - 2⁵ = 77468837 is a prime.

It is a super-2 number, since 2×77468869² = 12002851328278322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77468863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38734434 + 38734435.

It is an arithmetic number, because the mean of its divisors is an integer number (38734435).

Almost surely, 2^77468869 is an apocalyptic number.

It is an amenable number.

77468869 is a deficient number, since it is larger than the sum of its proper divisors (1).

77468869 is an equidigital number, since it uses as much as digits as its factorization.

77468869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The square root of 77468869 is about 8801.6401312483. The cubic root of 77468869 is about 426.2938545018.

The spelling of 77468869 in words is "seventy-seven million, four hundred sixty-eight thousand, eight hundred sixty-nine".