396738493 has 2 divisors, whose sum is σ = 396738494. Its totient is φ = 396738492.

The previous prime is 396738491. The next prime is 396738499. The reversal of 396738493 is 394837693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313892089 + 82846404 = 17717^2 + 9102^2 .

It is a cyclic number.

It is not a de Polignac number, because 396738493 - 2¹ = 396738491 is a prime.

It is a super-2 number, since 2×396738493² = 314802863655822098, which contains 22 as substring.

Together with 396738491, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 396738493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396738491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198369246 + 198369247.

It is an arithmetic number, because the mean of its divisors is an integer number (198369247).

Almost surely, 2^396738493 is an apocalyptic number.

It is an amenable number.

396738493 is a deficient number, since it is larger than the sum of its proper divisors (1).

396738493 is an equidigital number, since it uses as much as digits as its factorization.

396738493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 52.

The square root of 396738493 is about 19918.2954340978. The cubic root of 396738493 is about 734.7982496538.

The spelling of 396738493 in words is "three hundred ninety-six million, seven hundred thirty-eight thousand, four hundred ninety-three".