77412869 has 4 divisors (see below), whose sum is σ = 77431200. Its totient is φ = 77394540.

The previous prime is 77412851. The next prime is 77412877. The reversal of 77412869 is 96821477.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96821477 = 17 ⋅5695381.

It is a cyclic number.

It is not a de Polignac number, because 77412869 - 2⁸ = 77412613 is a prime.

It is a super-2 number, since 2×77412869² = 11985504573622322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77412899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734 + ... + 12464.

It is an arithmetic number, because the mean of its divisors is an integer number (19357800).

Almost surely, 2^77412869 is an apocalyptic number.

It is an amenable number.

77412869 is a deficient number, since it is larger than the sum of its proper divisors (18331).

77412869 is a wasteful number, since it uses less digits than its factorization.

77412869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18330.

The product of its digits is 169344, while the sum is 44.

The square root of 77412869 is about 8798.4583308668. The cubic root of 77412869 is about 426.1911112507.

The spelling of 77412869 in words is "seventy-seven million, four hundred twelve thousand, eight hundred sixty-nine".