397748509339 has 4 divisors (see below), whose sum is σ = 401610145456. Its totient is φ = 393886873224.

The previous prime is 397748509297. The next prime is 397748509357. The reversal of 397748509339 is 933905847793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933905847793 = 37 ⋅25240698589.

It is a cyclic number.

It is not a de Polignac number, because 397748509339 - 2⁷ = 397748509211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397748509399) 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, 1930817904 + ... + 1930818109.

It is an arithmetic number, because the mean of its divisors is an integer number (100402536364).

Almost surely, 2^397748509339 is an apocalyptic number.

397748509339 is a deficient number, since it is larger than the sum of its proper divisors (3861636117).

397748509339 is a wasteful number, since it uses less digits than its factorization.

397748509339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861636116.

The product of its (nonzero) digits is 154314720, while the sum is 67.

The spelling of 397748509339 in words is "three hundred ninety-seven billion, seven hundred forty-eight million, five hundred nine thousand, three hundred thirty-nine".