397017827 has 4 divisors (see below), whose sum is σ = 398798400. Its totient is φ = 395237256.

The previous prime is 397017823. The next prime is 397017851. The reversal of 397017827 is 728710793.

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

It is a cyclic number.

It is not a de Polignac number, because 397017827 - 2² = 397017823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397017821) 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, 889952 + ... + 890397.

It is an arithmetic number, because the mean of its divisors is an integer number (99699600).

Almost surely, 2^397017827 is an apocalyptic number.

397017827 is a deficient number, since it is larger than the sum of its proper divisors (1780573).

397017827 is a wasteful number, since it uses less digits than its factorization.

397017827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780572.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 397017827 is about 19925.3061958907. The cubic root of 397017827 is about 734.9706604359.

The spelling of 397017827 in words is "three hundred ninety-seven million, seventeen thousand, eight hundred twenty-seven".