3897881239 has 4 divisors (see below), whose sum is σ = 4454721424. Its totient is φ = 3341041056.

The previous prime is 3897881219. The next prime is 3897881263. The reversal of 3897881239 is 9321887983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9321887983 = 263 ⋅35444441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3897881239 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 (3897881219) 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, 278420082 + ... + 278420095.

It is an arithmetic number, because the mean of its divisors is an integer number (1113680356).

Almost surely, 2^3897881239 is an apocalyptic number.

3897881239 is a deficient number, since it is larger than the sum of its proper divisors (556840185).

3897881239 is an equidigital number, since it uses as much as digits as its factorization.

3897881239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556840184.

The product of its digits is 5225472, while the sum is 58.

The square root of 3897881239 is about 62433.0140150225. The cubic root of 3897881239 is about 1573.7758172287.

The spelling of 3897881239 in words is "three billion, eight hundred ninety-seven million, eight hundred eighty-one thousand, two hundred thirty-nine".