147391 has 2 divisors, whose sum is σ = 147392. Its totient is φ = 147390.

The previous prime is 147377. The next prime is 147397. The reversal of 147391 is 193741.

It is a strong prime.

It is an emirp because it is prime and its reverse (193741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147391 - 2⁷ = 147263 is a prime.

147391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73695 + 73696.

It is an arithmetic number, because the mean of its divisors is an integer number (73696).

2¹⁴⁷³⁹¹ is an apocalyptic number.

147391 is a deficient number, since it is larger than the sum of its proper divisors (1).

147391 is an equidigital number, since it uses as much as digits as its factorization.

147391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 147391 is about 383.9153552543. The cubic root of 147391 is about 52.8230720639.

The spelling of 147391 in words is "one hundred forty-seven thousand, three hundred ninety-one".