77145823 has 8 divisors (see below), whose sum is σ = 78751440. Its totient is φ = 75556800.

The previous prime is 77145821. The next prime is 77145853. The reversal of 77145823 is 32854177.

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 77145823 - 2¹ = 77145821 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 (77145821) 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, 5473 + ... + 13573.

It is an arithmetic number, because the mean of its divisors is an integer number (9843930).

Almost surely, 2^77145823 is an apocalyptic number.

77145823 is a deficient number, since it is larger than the sum of its proper divisors (1605617).

77145823 is a wasteful number, since it uses less digits than its factorization.

77145823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8297.

The product of its digits is 47040, while the sum is 37.

The square root of 77145823 is about 8783.2694937591. The cubic root of 77145823 is about 425.7004789869.

The spelling of 77145823 in words is "seventy-seven million, one hundred forty-five thousand, eight hundred twenty-three".