70720147 has 8 divisors (see below), whose sum is σ = 77679360. Its totient is φ = 64084680.

The previous prime is 70720141. The next prime is 70720157. The reversal of 70720147 is 74102707.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70720147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70720141) 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, 80479 + ... + 81352.

It is an arithmetic number, because the mean of its divisors is an integer number (9709920).

Almost surely, 2^70720147 is an apocalyptic number.

70720147 is a deficient number, since it is larger than the sum of its proper divisors (6959213).

70720147 is a wasteful number, since it uses less digits than its factorization.

70720147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161873.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 70720147 is about 8409.5271567431. The cubic root of 70720147 is about 413.5370114942.

The spelling of 70720147 in words is "seventy million, seven hundred twenty thousand, one hundred forty-seven".