77273397 has 24 divisors (see below), whose sum is σ = 116247768. Its totient is φ = 49420800.

The previous prime is 77273393. The next prime is 77273407. The reversal of 77273397 is 79337277.

It can be written as a sum of positive squares in 4 ways, for example, as 5803281 + 71470116 = 2409^2 + 8454^2 .

It is not a de Polignac number, because 77273397 - 2² = 77273393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77273393) 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 23 ways as a sum of consecutive naturals, for example, 20793 + ... + 24225.

It is an arithmetic number, because the mean of its divisors is an integer number (4843657).

Almost surely, 2^77273397 is an apocalyptic number.

It is an amenable number.

77273397 is a deficient number, since it is larger than the sum of its proper divisors (38974371).

77273397 is a wasteful number, since it uses less digits than its factorization.

77273397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541 (or 3538 counting only the distinct ones).

The product of its digits is 388962, while the sum is 45.

The square root of 77273397 is about 8790.5288236829. The cubic root of 77273397 is about 425.9350062851.

The spelling of 77273397 in words is "seventy-seven million, two hundred seventy-three thousand, three hundred ninety-seven".