147317391 has 12 divisors (see below), whose sum is σ = 229160568. Its totient is φ = 90656784.

The previous prime is 147317381. The next prime is 147317399. The reversal of 147317391 is 193713741.

It is not a de Polignac number, because 147317391 - 2¹⁸ = 147055247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147317399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629445 + ... + 629678.

It is an arithmetic number, because the mean of its divisors is an integer number (19096714).

Almost surely, 2^147317391 is an apocalyptic number.

147317391 is a deficient number, since it is larger than the sum of its proper divisors (81843177).

147317391 is a wasteful number, since it uses less digits than its factorization.

147317391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259142 (or 1259139 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 147317391 is about 12137.4375796541. The cubic root of 147317391 is about 528.1427708783.

It can be divided in two parts, 14731 and 7391, that added together give a palindrome (22122).

The spelling of 147317391 in words is "one hundred forty-seven million, three hundred seventeen thousand, three hundred ninety-one".