391242153 has 8 divisors (see below), whose sum is σ = 523160928. Its totient is φ = 260075744.

The previous prime is 391242139. The next prime is 391242193. The reversal of 391242153 is 351242193.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391242153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 391242153.

It is not an unprimeable number, because it can be changed into a prime (391242133) 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, 186876 + ... + 188957.

It is an arithmetic number, because the mean of its divisors is an integer number (65395116).

Almost surely, 2^391242153 is an apocalyptic number.

It is an amenable number.

391242153 is a deficient number, since it is larger than the sum of its proper divisors (131918775).

391242153 is a wasteful number, since it uses less digits than its factorization.

391242153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376183.

The product of its digits is 6480, while the sum is 30.

The square root of 391242153 is about 19779.8420873373. The cubic root of 391242153 is about 731.3892061374.

The spelling of 391242153 in words is "three hundred ninety-one million, two hundred forty-two thousand, one hundred fifty-three".