78939741 has 4 divisors (see below), whose sum is σ = 105252992. Its totient is φ = 52626492.

The previous prime is 78939697. The next prime is 78939761. The reversal of 78939741 is 14793987.

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 78939741 - 2⁶ = 78939677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78939761) 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, 13156621 + ... + 13156626.

It is an arithmetic number, because the mean of its divisors is an integer number (26313248).

Almost surely, 2^78939741 is an apocalyptic number.

It is an amenable number.

78939741 is a deficient number, since it is larger than the sum of its proper divisors (26313251).

78939741 is a wasteful number, since it uses less digits than its factorization.

78939741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26313250.

The product of its digits is 381024, while the sum is 48.

The square root of 78939741 is about 8884.8039370602. The cubic root of 78939741 is about 428.9749171657.

The spelling of 78939741 in words is "seventy-eight million, nine hundred thirty-nine thousand, seven hundred forty-one".