385272997 has 4 divisors (see below), whose sum is σ = 385328140. Its totient is φ = 385217856.

The previous prime is 385272973. The next prime is 385273043. The reversal of 385272997 is 799272583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799272583 = 1979 ⋅403877.

It can be written as a sum of positive squares in 2 ways, for example, as 19660356 + 365612641 = 4434^2 + 19121^2 .

It is a cyclic number.

It is not a de Polignac number, because 385272997 - 2⁷ = 385272869 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 (385272947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15258 + ... + 31675.

It is an arithmetic number, because the mean of its divisors is an integer number (96332035).

Almost surely, 2^385272997 is an apocalyptic number.

It is an amenable number.

385272997 is a deficient number, since it is larger than the sum of its proper divisors (55143).

385272997 is an equidigital number, since it uses as much as digits as its factorization.

385272997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55142.

The product of its digits is 1905120, while the sum is 52.

The square root of 385272997 is about 19628.3722452984. The cubic root of 385272997 is about 727.6505418594.

The spelling of 385272997 in words is "three hundred eighty-five million, two hundred seventy-two thousand, nine hundred ninety-seven".