77340641 has 4 divisors (see below), whose sum is σ = 88389312. Its totient is φ = 66291972.

The previous prime is 77340611. The next prime is 77340643. The reversal of 77340641 is 14604377.

It is a happy number.

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: 14604377 = 17 ⋅859081.

It is a cyclic number.

It is not a de Polignac number, because 77340641 - 2⁶ = 77340577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77340598 and 77340607.

It is not an unprimeable number, because it can be changed into a prime (77340643) 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, 5524325 + ... + 5524338.

It is an arithmetic number, because the mean of its divisors is an integer number (22097328).

Almost surely, 2^77340641 is an apocalyptic number.

It is an amenable number.

77340641 is a deficient number, since it is larger than the sum of its proper divisors (11048671).

77340641 is a wasteful number, since it uses less digits than its factorization.

77340641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11048670.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 77340641 is about 8794.3527902854. The cubic root of 77340641 is about 426.0585212792.

It can be divided in two parts, 773 and 40641, that added together give a palindrome (41414).

The spelling of 77340641 in words is "seventy-seven million, three hundred forty thousand, six hundred forty-one".