397413505 has 8 divisors (see below), whose sum is σ = 504949032. Its totient is φ = 299228928.

The previous prime is 397413503. The next prime is 397413517. The reversal of 397413505 is 505314793.

It can be written as a sum of positive squares in 4 ways, for example, as 136235584 + 261177921 = 11672^2 + 16161^2 .

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 397413505 - 2¹ = 397413503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397413503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2337642 + ... + 2337811.

It is an arithmetic number, because the mean of its divisors is an integer number (63118629).

Almost surely, 2^397413505 is an apocalyptic number.

It is an amenable number.

397413505 is a deficient number, since it is larger than the sum of its proper divisors (107535527).

397413505 is a wasteful number, since it uses less digits than its factorization.

397413505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675475.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 397413505 is about 19935.2327550997. The cubic root of 397413505 is about 735.2147428125.

The spelling of 397413505 in words is "three hundred ninety-seven million, four hundred thirteen thousand, five hundred five".