78070139 has 8 divisors (see below), whose sum is σ = 89315040. Its totient is φ = 66848256.

The previous prime is 78070133. The next prime is 78070141. The reversal of 78070139 is 93107087.

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 78070139 - 2⁴ = 78070123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78070099 and 78070108.

It is not an unprimeable number, because it can be changed into a prime (78070133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2267 + ... + 12699.

It is an arithmetic number, because the mean of its divisors is an integer number (11164380).

Almost surely, 2^78070139 is an apocalyptic number.

78070139 is a deficient number, since it is larger than the sum of its proper divisors (11244901).

78070139 is a wasteful number, since it uses less digits than its factorization.

78070139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11509.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 78070139 is about 8835.7308130115. The cubic root of 78070139 is about 427.3938981810.

The spelling of 78070139 in words is "seventy-eight million, seventy thousand, one hundred thirty-nine".