77748007 has 4 divisors (see below), whose sum is σ = 78177736. Its totient is φ = 77318280.

The previous prime is 77748001. The next prime is 77748029. The reversal of 77748007 is 70084777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70084777 = 7 ⋅10012111.

It is a cyclic number.

It is not a de Polignac number, because 77748007 - 2¹¹ = 77745959 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 (77748001) 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 3 ways as a sum of consecutive naturals, for example, 214593 + ... + 214954.

It is an arithmetic number, because the mean of its divisors is an integer number (19544434).

Almost surely, 2^77748007 is an apocalyptic number.

77748007 is a deficient number, since it is larger than the sum of its proper divisors (429729).

77748007 is a wasteful number, since it uses less digits than its factorization.

77748007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429728.

The product of its (nonzero) digits is 76832, while the sum is 40.

The square root of 77748007 is about 8817.4830308881. The cubic root of 77748007 is about 426.8052520868.

It can be divided in two parts, 777 and 48007, that added together give a palindrome (48784).

The spelling of 77748007 in words is "seventy-seven million, seven hundred forty-eight thousand, seven".