397787 has 8 divisors (see below), whose sum is σ = 440496. Its totient is φ = 356832.

The previous prime is 397763. The next prime is 397799. The reversal of 397787 is 787793.

It is a happy number.

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 397787 - 2⁶ = 397723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397757) 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, 68 + ... + 894.

It is an arithmetic number, because the mean of its divisors is an integer number (55062).

2³⁹⁷⁷⁸⁷ is an apocalyptic number.

397787 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

397787 is a deficient number, since it is larger than the sum of its proper divisors (42709).

397787 is a wasteful number, since it uses less digits than its factorization.

397787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877.

The product of its digits is 74088, while the sum is 41.

The square root of 397787 is about 630.7035753823. The cubic root of 397787 is about 73.5444992538.

The spelling of 397787 in words is "three hundred ninety-seven thousand, seven hundred eighty-seven".