3900000397 has 4 divisors (see below), whose sum is σ = 3901470876. Its totient is φ = 3898529920.

The previous prime is 3900000373. The next prime is 3900000407. The reversal of 3900000397 is 7930000093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7930000093 = 787 ⋅10076239.

It can be written as a sum of positive squares in 2 ways, for example, as 3400522596 + 499477801 = 58314^2 + 22349^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900000397 - 2¹⁹ = 3899476109 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 (3900000317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731254 + ... + 736567.

It is an arithmetic number, because the mean of its divisors is an integer number (975367719).

Almost surely, 2^3900000397 is an apocalyptic number.

It is an amenable number.

3900000397 is a deficient number, since it is larger than the sum of its proper divisors (1470479).

3900000397 is a wasteful number, since it uses less digits than its factorization.

3900000397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470478.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 3900000397 is about 62449.9831625278. The cubic root of 3900000397 is about 1574.0609700419.

The spelling of 3900000397 in words is "three billion, nine hundred million, three hundred ninety-seven", and thus it is an aban number.