77323397 has 4 divisors (see below), whose sum is σ = 77342400. Its totient is φ = 77304396.

The previous prime is 77323357. The next prime is 77323399. The reversal of 77323397 is 79332377.

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: 79332377 = 43 ⋅1844939.

It is a cyclic number.

It is not a de Polignac number, because 77323397 - 2¹⁸ = 77061253 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 (77323399) 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, 647 + ... + 12452.

It is an arithmetic number, because the mean of its divisors is an integer number (19335600).

Almost surely, 2^77323397 is an apocalyptic number.

It is an amenable number.

77323397 is a deficient number, since it is larger than the sum of its proper divisors (19003).

77323397 is a wasteful number, since it uses less digits than its factorization.

77323397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19002.

The product of its digits is 166698, while the sum is 41.

The square root of 77323397 is about 8793.3723337523. The cubic root of 77323397 is about 426.0268540163.

The spelling of 77323397 in words is "seventy-seven million, three hundred twenty-three thousand, three hundred ninety-seven".