397741745 has 8 divisors (see below), whose sum is σ = 477441384. Its totient is φ = 318092544.

The previous prime is 397741709. The next prime is 397741753. The reversal of 397741745 is 547147793.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 397723249 = 136^2 + 19943^2 .

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 397741745 - 2⁸ = 397741489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397741745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7727 + ... + 29243.

It is an arithmetic number, because the mean of its divisors is an integer number (59680173).

Almost surely, 2^397741745 is an apocalyptic number.

It is an amenable number.

397741745 is a deficient number, since it is larger than the sum of its proper divisors (79699639).

397741745 is a wasteful number, since it uses less digits than its factorization.

397741745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25219.

The product of its digits is 740880, while the sum is 47.

The square root of 397741745 is about 19943.4637162154. The cubic root of 397741745 is about 735.4171017108.

The spelling of 397741745 in words is "three hundred ninety-seven million, seven hundred forty-one thousand, seven hundred forty-five".