77423722 has 4 divisors (see below), whose sum is σ = 116135586. Its totient is φ = 38711860.

The previous prime is 77423719. The next prime is 77423741. The reversal of 77423722 is 22732477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22732477 = 139 ⋅163543.

It can be written as a sum of positive squares in only one way, i.e., 54007801 + 23415921 = 7349^2 + 4839^2 .

It is a super-3 number, since 3×77423722³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19355929 + ... + 19355932.

Almost surely, 2^77423722 is an apocalyptic number.

77423722 is a deficient number, since it is larger than the sum of its proper divisors (38711864).

77423722 is a wasteful number, since it uses less digits than its factorization.

77423722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38711863.

The product of its digits is 32928, while the sum is 34.

The square root of 77423722 is about 8799.0750650281. The cubic root of 77423722 is about 426.2110271296.

The spelling of 77423722 in words is "seventy-seven million, four hundred twenty-three thousand, seven hundred twenty-two".