77332397 has 2 divisors, whose sum is σ = 77332398. Its totient is φ = 77332396.

The previous prime is 77332319. The next prime is 77332399. The reversal of 77332397 is 79323377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76930441 + 401956 = 8771^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 77332397 - 2²⁶ = 10223533 is a prime.

Together with 77332399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77332399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38666198 + 38666199.

It is an arithmetic number, because the mean of its divisors is an integer number (38666199).

Almost surely, 2^77332397 is an apocalyptic number.

It is an amenable number.

77332397 is a deficient number, since it is larger than the sum of its proper divisors (1).

77332397 is an equidigital number, since it uses as much as digits as its factorization.

77332397 is an odious number, because the sum of its binary digits is odd.

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

The square root of 77332397 is about 8793.8840679190. The cubic root of 77332397 is about 426.0433824026.

The spelling of 77332397 in words is "seventy-seven million, three hundred thirty-two thousand, three hundred ninety-seven".