397850013 has 24 divisors (see below), whose sum is σ = 631721376. Its totient is φ = 239272800.

The previous prime is 397849981. The next prime is 397850017. The reversal of 397850013 is 310058793.

It is not a de Polignac number, because 397850013 - 2⁵ = 397849981 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 397850013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397850017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2370 + ... + 28307.

It is an arithmetic number, because the mean of its divisors is an integer number (26321724).

Almost surely, 2^397850013 is an apocalyptic number.

397850013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

397850013 is a deficient number, since it is larger than the sum of its proper divisors (233871363).

397850013 is a wasteful number, since it uses less digits than its factorization.

397850013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30825 (or 30822 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 397850013 is about 19946.1779045510. The cubic root of 397850013 is about 735.4838241643.

The spelling of 397850013 in words is "three hundred ninety-seven million, eight hundred fifty thousand, thirteen".