397837869 has 16 divisors (see below), whose sum is σ = 623187264. Its totient is φ = 222566400.

The previous prime is 397837823. The next prime is 397837871. The reversal of 397837869 is 968738793.

It is not a de Polignac number, because 397837869 - 2¹⁵ = 397805101 is a prime.

It is a super-3 number, since 3×397837869³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397837879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463252 + ... + 464109.

It is an arithmetic number, because the mean of its divisors is an integer number (38949204).

Almost surely, 2^397837869 is an apocalyptic number.

397837869 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

397837869 is a deficient number, since it is larger than the sum of its proper divisors (225349395).

397837869 is a wasteful number, since it uses less digits than its factorization.

397837869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927388.

The product of its digits is 13716864, while the sum is 60.

The square root of 397837869 is about 19945.8734830039. The cubic root of 397837869 is about 735.4763407693.

The spelling of 397837869 in words is "three hundred ninety-seven million, eight hundred thirty-seven thousand, eight hundred sixty-nine".