70447139 has 4 divisors (see below), whose sum is σ = 80511024. Its totient is φ = 60383256.

The previous prime is 70447081. The next prime is 70447141. The reversal of 70447139 is 93174407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93174407 = 271 ⋅343817.

It is a cyclic number.

It is not a de Polignac number, because 70447139 - 2¹⁶ = 70381603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70447099 and 70447108.

It is not an unprimeable number, because it can be changed into a prime (70447639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5031932 + ... + 5031945.

It is an arithmetic number, because the mean of its divisors is an integer number (20127756).

Almost surely, 2^70447139 is an apocalyptic number.

70447139 is a deficient number, since it is larger than the sum of its proper divisors (10063885).

70447139 is a wasteful number, since it uses less digits than its factorization.

70447139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10063884.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 70447139 is about 8393.2793948492. The cubic root of 70447139 is about 413.0041859468.

The spelling of 70447139 in words is "seventy million, four hundred forty-seven thousand, one hundred thirty-nine".