147720617 has 8 divisors (see below), whose sum is σ = 161243040. Its totient is φ = 134213760.

The previous prime is 147720607. The next prime is 147720619. The reversal of 147720617 is 716027741.

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

It is a cyclic number.

It is not a de Polignac number, because 147720617 - 2⁶ = 147720553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147720619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25934 + ... + 31112.

It is an arithmetic number, because the mean of its divisors is an integer number (20155380).

Almost surely, 2^147720617 is an apocalyptic number.

It is an amenable number.

147720617 is a deficient number, since it is larger than the sum of its proper divisors (13522423).

147720617 is a wasteful number, since it uses less digits than its factorization.

147720617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 147720617 is about 12154.0370659300. The cubic root of 147720617 is about 528.6241960295.

The spelling of 147720617 in words is "one hundred forty-seven million, seven hundred twenty thousand, six hundred seventeen".