70320639 has 8 divisors (see below), whose sum is σ = 93853312. Its totient is φ = 46834200.

The previous prime is 70320631. The next prime is 70320641. The reversal of 70320639 is 93602307.

It is a happy number.

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

It is not a de Polignac number, because 70320639 - 2³ = 70320631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70320631) 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, 7837 + ... + 14214.

It is an arithmetic number, because the mean of its divisors is an integer number (11731664).

Almost surely, 2^70320639 is an apocalyptic number.

70320639 is a deficient number, since it is larger than the sum of its proper divisors (23532673).

70320639 is a wasteful number, since it uses less digits than its factorization.

70320639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23117.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 70320639 is about 8385.7402177745. The cubic root of 70320639 is about 412.7568310594.

The spelling of 70320639 in words is "seventy million, three hundred twenty thousand, six hundred thirty-nine".