147840491 has 2 divisors, whose sum is σ = 147840492. Its totient is φ = 147840490.

The previous prime is 147840487. The next prime is 147840503. The reversal of 147840491 is 194048741.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 147840491 - 2² = 147840487 is a prime.

It is not a weakly prime, because it can be changed into another prime (147840401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73920245 + 73920246.

It is an arithmetic number, because the mean of its divisors is an integer number (73920246).

Almost surely, 2^147840491 is an apocalyptic number.

147840491 is a deficient number, since it is larger than the sum of its proper divisors (1).

147840491 is an equidigital number, since it uses as much as digits as its factorization.

147840491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 147840491 is about 12158.9675137324. The cubic root of 147840491 is about 528.7671486855.

The spelling of 147840491 in words is "one hundred forty-seven million, eight hundred forty thousand, four hundred ninety-one".