39218961 has 4 divisors (see below), whose sum is σ = 52291952. Its totient is φ = 26145972.

The previous prime is 39218939. The next prime is 39218969. The reversal of 39218961 is 16981293.

39218961 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39218961 - 2⁶ = 39218897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39218969) 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, 6536491 + ... + 6536496.

It is an arithmetic number, because the mean of its divisors is an integer number (13072988).

Almost surely, 2^39218961 is an apocalyptic number.

It is an amenable number.

39218961 is a deficient number, since it is larger than the sum of its proper divisors (13072991).

39218961 is a wasteful number, since it uses less digits than its factorization.

39218961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13072990.

The product of its digits is 23328, while the sum is 39.

The square root of 39218961 is about 6262.5043712560. The cubic root of 39218961 is about 339.7546124435.

The spelling of 39218961 in words is "thirty-nine million, two hundred eighteen thousand, nine hundred sixty-one".