396538973 has 2 divisors, whose sum is σ = 396538974. Its totient is φ = 396538972.

The previous prime is 396538969. The next prime is 396539023. The reversal of 396538973 is 379835693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298667524 + 97871449 = 17282^2 + 9893^2 .

It is an emirp because it is prime and its reverse (379835693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396538973 - 2² = 396538969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396538903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198269486 + 198269487.

It is an arithmetic number, because the mean of its divisors is an integer number (198269487).

Almost surely, 2^396538973 is an apocalyptic number.

It is an amenable number.

396538973 is a deficient number, since it is larger than the sum of its proper divisors (1).

396538973 is an equidigital number, since it uses as much as digits as its factorization.

396538973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 53.

The square root of 396538973 is about 19913.2863435446. The cubic root of 396538973 is about 734.6750521887.

The spelling of 396538973 in words is "three hundred ninety-six million, five hundred thirty-eight thousand, nine hundred seventy-three".