397245322729 has 4 divisors (see below), whose sum is σ = 400373238784. Its totient is φ = 394117406676.

The previous prime is 397245322673. The next prime is 397245322739. The reversal of 397245322729 is 927223542793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927223542793 = 2339 ⋅396418787.

It is a cyclic number.

It is not a de Polignac number, because 397245322729 - 2¹⁷ = 397245191657 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 397245322729.

It is not an unprimeable number, because it can be changed into a prime (397245322739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563957837 + ... + 1563958090.

It is an arithmetic number, because the mean of its divisors is an integer number (100093309696).

Almost surely, 2^397245322729 is an apocalyptic number.

It is an amenable number.

397245322729 is a deficient number, since it is larger than the sum of its proper divisors (3127916055).

397245322729 is a wasteful number, since it uses less digits than its factorization.

397245322729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127916054.

The product of its digits is 11430720, while the sum is 55.

The spelling of 397245322729 in words is "three hundred ninety-seven billion, two hundred forty-five million, three hundred twenty-two thousand, seven hundred twenty-nine".