4397385491 has 2 divisors, whose sum is σ = 4397385492. Its totient is φ = 4397385490.

The previous prime is 4397385457. The next prime is 4397385523. The reversal of 4397385491 is 1945837934.

4397385491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4397385491 is a prime.

It is a super-2 number, since 2×4397385491² = 38673998312914622162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4397385431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2198692745 + 2198692746.

It is an arithmetic number, because the mean of its divisors is an integer number (2198692746).

Almost surely, 2^4397385491 is an apocalyptic number.

4397385491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4397385491 is an equidigital number, since it uses as much as digits as its factorization.

4397385491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The square root of 4397385491 is about 66312.7852755409. The cubic root of 4397385491 is about 1638.3179128280.

The spelling of 4397385491 in words is "four billion, three hundred ninety-seven million, three hundred eighty-five thousand, four hundred ninety-one".