147992617 has 4 divisors (see below), whose sum is σ = 148029700. Its totient is φ = 147955536.

The previous prime is 147992587. The next prime is 147992623. The reversal of 147992617 is 716299741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 716299741 = 23 ⋅31143467.

It can be written as a sum of positive squares in 2 ways, for example, as 75759616 + 72233001 = 8704^2 + 8499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147992617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147992687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11718 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (37007425).

Almost surely, 2^147992617 is an apocalyptic number.

It is an amenable number.

147992617 is a deficient number, since it is larger than the sum of its proper divisors (37083).

147992617 is an equidigital number, since it uses as much as digits as its factorization.

147992617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37082.

The product of its digits is 190512, while the sum is 46.

The square root of 147992617 is about 12165.2216173812. The cubic root of 147992617 is about 528.9484514219.

The spelling of 147992617 in words is "one hundred forty-seven million, nine hundred ninety-two thousand, six hundred seventeen".