147723139 has 4 divisors (see below), whose sum is σ = 148103280. Its totient is φ = 147343000.

The previous prime is 147723133. The next prime is 147723161. The reversal of 147723139 is 931327741.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931327741 = 463 ⋅2011507.

It is a cyclic number.

It is not a de Polignac number, because 147723139 - 2³ = 147723131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 147723098 and 147723107.

It is not an unprimeable number, because it can be changed into a prime (147723131) 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, 189487 + ... + 190264.

It is an arithmetic number, because the mean of its divisors is an integer number (37025820).

Almost surely, 2^147723139 is an apocalyptic number.

147723139 is a deficient number, since it is larger than the sum of its proper divisors (380141).

147723139 is an equidigital number, since it uses as much as digits as its factorization.

147723139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380140.

The product of its digits is 31752, while the sum is 37.

The square root of 147723139 is about 12154.1408170220. The cubic root of 147723139 is about 528.6272043720.

The spelling of 147723139 in words is "one hundred forty-seven million, seven hundred twenty-three thousand, one hundred thirty-nine".