77735397 has 4 divisors (see below), whose sum is σ = 103647200. Its totient is φ = 51823596.

The previous prime is 77735387. The next prime is 77735401. The reversal of 77735397 is 79353777.

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: 79353777 = 3 ⋅26451259.

It is not a de Polignac number, because 77735397 - 2¹¹ = 77733349 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 (77735387) 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, 12955897 + ... + 12955902.

It is an arithmetic number, because the mean of its divisors is an integer number (25911800).

Almost surely, 2^77735397 is an apocalyptic number.

It is an amenable number.

77735397 is a deficient number, since it is larger than the sum of its proper divisors (25911803).

77735397 is a wasteful number, since it uses less digits than its factorization.

77735397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25911802.

The product of its digits is 972405, while the sum is 48.

The square root of 77735397 is about 8816.7679452280. The cubic root of 77735397 is about 426.7821762318.

The spelling of 77735397 in words is "seventy-seven million, seven hundred thirty-five thousand, three hundred ninety-seven".