147227991 has 8 divisors (see below), whose sum is σ = 204839040. Its totient is φ = 93884472.

The previous prime is 147227989. The next prime is 147228013. The reversal of 147227991 is 199722741.

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

It is not a de Polignac number, because 147227991 - 2¹ = 147227989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147227291) 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, 1066801 + ... + 1066938.

It is an arithmetic number, because the mean of its divisors is an integer number (25604880).

Almost surely, 2^147227991 is an apocalyptic number.

147227991 is a deficient number, since it is larger than the sum of its proper divisors (57611049).

147227991 is a wasteful number, since it uses less digits than its factorization.

147227991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133765.

The product of its digits is 63504, while the sum is 42.

The square root of 147227991 is about 12133.7542005762. The cubic root of 147227991 is about 528.0359142524.

The spelling of 147227991 in words is "one hundred forty-seven million, two hundred twenty-seven thousand, nine hundred ninety-one".