77634797 has 4 divisors (see below), whose sum is σ = 78570240. Its totient is φ = 76699356.

The previous prime is 77634787. The next prime is 77634833. The reversal of 77634797 is 79743677.

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: 79743677 = 13 ⋅6134129.

It is a cyclic number.

It is not a de Polignac number, because 77634797 - 2¹⁸ = 77372653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77634727) 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, 467597 + ... + 467762.

It is an arithmetic number, because the mean of its divisors is an integer number (19642560).

Almost surely, 2^77634797 is an apocalyptic number.

It is an amenable number.

77634797 is a deficient number, since it is larger than the sum of its proper divisors (935443).

77634797 is an equidigital number, since it uses as much as digits as its factorization.

77634797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935442.

The product of its digits is 1555848, while the sum is 50.

The square root of 77634797 is about 8811.0610598270. The cubic root of 77634797 is about 426.5979923515.

The spelling of 77634797 in words is "seventy-seven million, six hundred thirty-four thousand, seven hundred ninety-seven".