77740223 has 8 divisors (see below), whose sum is σ = 86876496. Its totient is φ = 68948800.

The previous prime is 77740211. The next prime is 77740279. The reversal of 77740223 is 32204777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77740223 - 2⁸ = 77739967 is a prime.

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 77740223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77740283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85736 + ... + 86637.

It is an arithmetic number, because the mean of its divisors is an integer number (10859562).

Almost surely, 2^77740223 is an apocalyptic number.

77740223 is a deficient number, since it is larger than the sum of its proper divisors (9136273).

77740223 is a wasteful number, since it uses less digits than its factorization.

77740223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172425.

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 77740223 is about 8817.0416240369. The cubic root of 77740223 is about 426.7910079362.

The spelling of 77740223 in words is "seventy-seven million, seven hundred forty thousand, two hundred twenty-three".