77450863 has 4 divisors (see below), whose sum is σ = 88515280. Its totient is φ = 66386448.

The previous prime is 77450843. The next prime is 77450873. The reversal of 77450863 is 36805477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36805477 = 71 ⋅518387.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77450863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77450843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5532198 + ... + 5532211.

It is an arithmetic number, because the mean of its divisors is an integer number (22128820).

Almost surely, 2^77450863 is an apocalyptic number.

77450863 is a deficient number, since it is larger than the sum of its proper divisors (11064417).

77450863 is a wasteful number, since it uses less digits than its factorization.

77450863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064416.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 77450863 is about 8800.6171942654. The cubic root of 77450863 is about 426.2608242794.

It can be divided in two parts, 7745086 and 3, that added together give a square (7745089 = 2783²).

The spelling of 77450863 in words is "seventy-seven million, four hundred fifty thousand, eight hundred sixty-three".