3840913 has 2 divisors, whose sum is σ = 3840914. Its totient is φ = 3840912.

The previous prime is 3840911. The next prime is 3840923. The reversal of 3840913 is 3190483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2534464 + 1306449 = 1592^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 3840913 - 2¹ = 3840911 is a prime.

It is a super-2 number, since 2×3840913² = 29505225347138, which contains 22 as substring.

Together with 3840911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3840911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920456 + 1920457.

It is an arithmetic number, because the mean of its divisors is an integer number (1920457).

Almost surely, 2^3840913 is an apocalyptic number.

It is an amenable number.

3840913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3840913 is an equidigital number, since it uses as much as digits as its factorization.

3840913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3840913 is about 1959.8247370620. The cubic root of 3840913 is about 156.6071153374.

It can be divided in two parts, 3840 and 913, that added together give a triangular number (4753 = T₉₇).

The spelling of 3840913 in words is "three million, eight hundred forty thousand, nine hundred thirteen".