391229147 has 8 divisors (see below), whose sum is σ = 399274512. Its totient is φ = 383248800.

The previous prime is 391229117. The next prime is 391229183. The reversal of 391229147 is 741922193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 391229147 - 2⁸ = 391228891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 391229147.

It is not an unprimeable number, because it can be changed into a prime (391229117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4004 + ... + 28257.

It is an arithmetic number, because the mean of its divisors is an integer number (49909314).

Almost surely, 2^391229147 is an apocalyptic number.

391229147 is a deficient number, since it is larger than the sum of its proper divisors (8045365).

391229147 is a wasteful number, since it uses less digits than its factorization.

391229147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32509.

The product of its digits is 27216, while the sum is 38.

The square root of 391229147 is about 19779.5133155495. The cubic root of 391229147 is about 731.3811015629.

The spelling of 391229147 in words is "three hundred ninety-one million, two hundred twenty-nine thousand, one hundred forty-seven".