77400273 has 16 divisors (see below), whose sum is σ = 106831872. Its totient is φ = 49794000.

The previous prime is 77400241. The next prime is 77400287. The reversal of 77400273 is 37200477.

It is a happy number.

It is not a de Polignac number, because 77400273 - 2⁵ = 77400241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77400273.

It is not an unprimeable number, because it can be changed into a prime (77400223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39118 + ... + 41048.

It is an arithmetic number, because the mean of its divisors is an integer number (6676992).

Almost surely, 2^77400273 is an apocalyptic number.

It is an amenable number.

77400273 is a deficient number, since it is larger than the sum of its proper divisors (29431599).

77400273 is a wasteful number, since it uses less digits than its factorization.

77400273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 77400273 is about 8797.7424945266. The cubic root of 77400273 is about 426.1679945325.

The spelling of 77400273 in words is "seventy-seven million, four hundred thousand, two hundred seventy-three".