3865749397 has 2 divisors, whose sum is σ = 3865749398. Its totient is φ = 3865749396.

The previous prime is 3865749379. The next prime is 3865749409. The reversal of 3865749397 is 7939475683.

Together with previous prime (3865749379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2786889681 + 1078859716 = 52791^2 + 32846^2 .

It is an emirp because it is prime and its reverse (7939475683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3865749397 - 2²⁷ = 3731531669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3865749337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932874698 + 1932874699.

It is an arithmetic number, because the mean of its divisors is an integer number (1932874699).

Almost surely, 2^3865749397 is an apocalyptic number.

It is an amenable number.

3865749397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865749397 is an equidigital number, since it uses as much as digits as its factorization.

3865749397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 61.

The square root of 3865749397 is about 62175.1509608139. The cubic root of 3865749397 is about 1569.4394522062.

The spelling of 3865749397 in words is "three billion, eight hundred sixty-five million, seven hundred forty-nine thousand, three hundred ninety-seven".