70439647 has 2 divisors, whose sum is σ = 70439648. Its totient is φ = 70439646.

The previous prime is 70439587. The next prime is 70439651. The reversal of 70439647 is 74693407.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70439647 - 2¹¹ = 70437599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70439147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35219823 + 35219824.

It is an arithmetic number, because the mean of its divisors is an integer number (35219824).

Almost surely, 2^70439647 is an apocalyptic number.

70439647 is a deficient number, since it is larger than the sum of its proper divisors (1).

70439647 is an equidigital number, since it uses as much as digits as its factorization.

70439647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 70439647 is about 8392.8330735217. The cubic root of 70439647 is about 412.9895445334.

The spelling of 70439647 in words is "seventy million, four hundred thirty-nine thousand, six hundred forty-seven".