77388723 has 12 divisors (see below), whose sum is σ = 114717720. Its totient is φ = 51562008.

The previous prime is 77388659. The next prime is 77388749. The reversal of 77388723 is 32788377.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 77388723 - 2⁶ = 77388659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77388763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44865 + ... + 46557.

It is an arithmetic number, because the mean of its divisors is an integer number (9559810).

Almost surely, 2^77388723 is an apocalyptic number.

77388723 is a deficient number, since it is larger than the sum of its proper divisors (37328997).

77388723 is an frugal number, since it uses more digits than its factorization.

77388723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395 (or 1696 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 77388723 is about 8797.0860516423. The cubic root of 77388723 is about 426.1467952739.

It can be divided in two parts, 7738 and 8723, that added together give a palindrome (16461).

The spelling of 77388723 in words is "seventy-seven million, three hundred eighty-eight thousand, seven hundred twenty-three".