397493147999 has 4 divisors (see below), whose sum is σ = 398035431336. Its totient is φ = 396950864664.

The previous prime is 397493147959. The next prime is 397493148037. The reversal of 397493147999 is 999741394793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397493147999 - 2¹² = 397493143903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397493147929) 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 3 ways as a sum of consecutive naturals, for example, 271140569 + ... + 271142034.

It is an arithmetic number, because the mean of its divisors is an integer number (99508857834).

Almost surely, 2^397493147999 is an apocalyptic number.

397493147999 is a deficient number, since it is larger than the sum of its proper divisors (542283337).

397493147999 is an equidigital number, since it uses as much as digits as its factorization.

397493147999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542283336.

The product of its digits is 416649744, while the sum is 74.

The spelling of 397493147999 in words is "three hundred ninety-seven billion, four hundred ninety-three million, one hundred forty-seven thousand, nine hundred ninety-nine".