70320647 has 2 divisors, whose sum is σ = 70320648. Its totient is φ = 70320646.

The previous prime is 70320643. The next prime is 70320659. The reversal of 70320647 is 74602307.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70320647 - 2² = 70320643 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70320641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35160323 + 35160324.

It is an arithmetic number, because the mean of its divisors is an integer number (35160324).

Almost surely, 2^70320647 is an apocalyptic number.

70320647 is a deficient number, since it is larger than the sum of its proper divisors (1).

70320647 is an equidigital number, since it uses as much as digits as its factorization.

70320647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 70320647 is about 8385.7406947747. The cubic root of 70320647 is about 412.7568467118.

The spelling of 70320647 in words is "seventy million, three hundred twenty thousand, six hundred forty-seven".