397812005 has 8 divisors (see below), whose sum is σ = 483417600. Its totient is φ = 314220816.

The previous prime is 397811993. The next prime is 397812029. The reversal of 397812005 is 500218793.

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 397812005 - 2²⁰ = 396763429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503165 + ... + 503954.

It is an arithmetic number, because the mean of its divisors is an integer number (60427200).

Almost surely, 2^397812005 is an apocalyptic number.

It is an amenable number.

397812005 is a deficient number, since it is larger than the sum of its proper divisors (85605595).

397812005 is a wasteful number, since it uses less digits than its factorization.

397812005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007203.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 397812005 is about 19945.2251178070. The cubic root of 397812005 is about 735.4604023064.

The spelling of 397812005 in words is "three hundred ninety-seven million, eight hundred twelve thousand, five".