3897478829 has 2 divisors, whose sum is σ = 3897478830. Its totient is φ = 3897478828.

The previous prime is 3897478801. The next prime is 3897478831. The reversal of 3897478829 is 9288747983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3884156329 + 13322500 = 62323^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 3897478829 - 2¹² = 3897474733 is a prime.

It is a super-2 number, since 2×3897478829² = 30380682445006422482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3897478831, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3897478889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1948739414 + 1948739415.

It is an arithmetic number, because the mean of its divisors is an integer number (1948739415).

Almost surely, 2^3897478829 is an apocalyptic number.

It is an amenable number.

3897478829 is a deficient number, since it is larger than the sum of its proper divisors (1).

3897478829 is an equidigital number, since it uses as much as digits as its factorization.

3897478829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48771072, while the sum is 65.

The square root of 3897478829 is about 62429.7911977927. The cubic root of 3897478829 is about 1573.7216574700.

The spelling of 3897478829 in words is "three billion, eight hundred ninety-seven million, four hundred seventy-eight thousand, eight hundred twenty-nine".