147438791 has 2 divisors, whose sum is σ = 147438792. Its totient is φ = 147438790.

The previous prime is 147438779. The next prime is 147438839. The reversal of 147438791 is 197834741.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147438791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147438761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73719395 + 73719396.

It is an arithmetic number, because the mean of its divisors is an integer number (73719396).

Almost surely, 2^147438791 is an apocalyptic number.

147438791 is a deficient number, since it is larger than the sum of its proper divisors (1).

147438791 is an equidigital number, since it uses as much as digits as its factorization.

147438791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 147438791 is about 12142.4376053575. The cubic root of 147438791 is about 528.2878067717.

The spelling of 147438791 in words is "one hundred forty-seven million, four hundred thirty-eight thousand, seven hundred ninety-one".