397260661 has 8 divisors (see below), whose sum is σ = 454165184. Its totient is φ = 340394400.

The previous prime is 397260631. The next prime is 397260673. The reversal of 397260661 is 166062793.

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 397260661 - 2⁷ = 397260533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397260631) 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, 17986 + ... + 33436.

It is an arithmetic number, because the mean of its divisors is an integer number (56770648).

Almost surely, 2^397260661 is an apocalyptic number.

It is an amenable number.

397260661 is a deficient number, since it is larger than the sum of its proper divisors (56904523).

397260661 is a wasteful number, since it uses less digits than its factorization.

397260661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19131.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 397260661 is about 19931.3988721314. The cubic root of 397260661 is about 735.1204769577.

The spelling of 397260661 in words is "three hundred ninety-seven million, two hundred sixty thousand, six hundred sixty-one".