39216977 has 4 divisors (see below), whose sum is σ = 41523876. Its totient is φ = 36910080.

The previous prime is 39216973. The next prime is 39217039. The reversal of 39216977 is 77961293.

It is a happy number.

39216977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77961293 = 4073 ⋅19141.

It can be written as a sum of positive squares in 2 ways, for example, as 27920656 + 11296321 = 5284^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 39216977 - 2² = 39216973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39216973) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1153424 + ... + 1153457.

It is an arithmetic number, because the mean of its divisors is an integer number (10380969).

Almost surely, 2^39216977 is an apocalyptic number.

It is an amenable number.

39216977 is a deficient number, since it is larger than the sum of its proper divisors (2306899).

39216977 is a wasteful number, since it uses less digits than its factorization.

39216977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306898.

The product of its digits is 142884, while the sum is 44.

The square root of 39216977 is about 6262.3459661695. The cubic root of 39216977 is about 339.7488832036.

The spelling of 39216977 in words is "thirty-nine million, two hundred sixteen thousand, nine hundred seventy-seven".