397648894403 has 4 divisors (see below), whose sum is σ = 397724226240. Its totient is φ = 397573562568.

The previous prime is 397648894399. The next prime is 397648894451. The reversal of 397648894403 is 304498846793.

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 397648894403 - 2² = 397648894399 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 397648894403.

It is not an unprimeable number, because it can be changed into a prime (397648894453) 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, 37658000 + ... + 37668557.

It is an arithmetic number, because the mean of its divisors is an integer number (99431056560).

Almost surely, 2^397648894403 is an apocalyptic number.

397648894403 is a deficient number, since it is larger than the sum of its proper divisors (75331837).

397648894403 is an equidigital number, since it uses as much as digits as its factorization.

397648894403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75331836.

The product of its (nonzero) digits is 125411328, while the sum is 65.

The spelling of 397648894403 in words is "three hundred ninety-seven billion, six hundred forty-eight million, eight hundred ninety-four thousand, four hundred three".