78939107 has 8 divisors (see below), whose sum is σ = 85535184. Its totient is φ = 72417888.

The previous prime is 78939103. The next prime is 78939137. The reversal of 78939107 is 70193987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78939107 - 2² = 78939103 is a prime.

It is a super-2 number, since 2×78939107² = 12462765227914898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78939103) 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 7 ways as a sum of consecutive naturals, for example, 16508 + ... + 20745.

It is an arithmetic number, because the mean of its divisors is an integer number (10691898).

Almost surely, 2^78939107 is an apocalyptic number.

78939107 is a deficient number, since it is larger than the sum of its proper divisors (6596077).

78939107 is a wasteful number, since it uses less digits than its factorization.

78939107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37429.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 78939107 is about 8884.7682580920. The cubic root of 78939107 is about 428.9737687335.

The spelling of 78939107 in words is "seventy-eight million, nine hundred thirty-nine thousand, one hundred seven".