77343657 has 4 divisors (see below), whose sum is σ = 103124880. Its totient is φ = 51562436.

The previous prime is 77343647. The next prime is 77343683. The reversal of 77343657 is 75634377.

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.

It is a cyclic number.

It is not a de Polignac number, because 77343657 - 2⁶ = 77343593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77343647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12890607 + ... + 12890612.

It is an arithmetic number, because the mean of its divisors is an integer number (25781220).

Almost surely, 2^77343657 is an apocalyptic number.

It is an amenable number.

77343657 is a deficient number, since it is larger than the sum of its proper divisors (25781223).

77343657 is a wasteful number, since it uses less digits than its factorization.

77343657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25781222.

The product of its digits is 370440, while the sum is 42.

The square root of 77343657 is about 8794.5242622896. The cubic root of 77343657 is about 426.0640594446.

The spelling of 77343657 in words is "seventy-seven million, three hundred forty-three thousand, six hundred fifty-seven".