77320127 has 4 divisors (see below), whose sum is σ = 77338800. Its totient is φ = 77301456.

The previous prime is 77320109. The next prime is 77320129. The reversal of 77320127 is 72102377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72102377 = 1061 ⋅67957.

It is a cyclic number.

It is not a de Polignac number, because 77320127 - 2⁸ = 77319871 is a prime.

It is a super-2 number, since 2×77320127² = 11956804078592258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77320127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77320129) 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 in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (19334700).

Almost surely, 2^77320127 is an apocalyptic number.

77320127 is a deficient number, since it is larger than the sum of its proper divisors (18673).

77320127 is a wasteful number, since it uses less digits than its factorization.

77320127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18672.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 77320127 is about 8793.1863962957. The cubic root of 77320127 is about 426.0208483849.

The spelling of 77320127 in words is "seventy-seven million, three hundred twenty thousand, one hundred twenty-seven".