397201717 has 4 divisors (see below), whose sum is σ = 433310976. Its totient is φ = 361092460.

The previous prime is 397201709. The next prime is 397201723. The reversal of 397201717 is 717102793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 717102793 = 11 ⋅65191163.

It is a cyclic number.

It is not a de Polignac number, because 397201717 - 2³ = 397201709 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 (397201817) 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, 18054613 + ... + 18054634.

It is an arithmetic number, because the mean of its divisors is an integer number (108327744).

Almost surely, 2^397201717 is an apocalyptic number.

It is an amenable number.

397201717 is a deficient number, since it is larger than the sum of its proper divisors (36109259).

397201717 is a wasteful number, since it uses less digits than its factorization.

397201717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36109258.

The product of its (nonzero) digits is 18522, while the sum is 37.

The square root of 397201717 is about 19929.9201453493. The cubic root of 397201717 is about 735.0841170485.

The spelling of 397201717 in words is "three hundred ninety-seven million, two hundred one thousand, seven hundred seventeen".