601228391 has 4 divisors (see below), whose sum is σ = 601750992. Its totient is φ = 600705792.

The previous prime is 601228379. The next prime is 601228423. The reversal of 601228391 is 193822106.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-601228391 is a prime.

It is a super-2 number, since 2×601228391² = 722951156288897762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601228321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259571 + ... + 261876.

It is an arithmetic number, because the mean of its divisors is an integer number (150437748).

Almost surely, 2^601228391 is an apocalyptic number.

601228391 is a deficient number, since it is larger than the sum of its proper divisors (522601).

601228391 is a wasteful number, since it uses less digits than its factorization.

601228391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522600.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 601228391 is about 24519.9590334079. The cubic root of 601228391 is about 844.0078646610.

The spelling of 601228391 in words is "six hundred one million, two hundred twenty-eight thousand, three hundred ninety-one".