3646840427 has 2 divisors, whose sum is σ = 3646840428. Its totient is φ = 3646840426.

The previous prime is 3646840399. The next prime is 3646840429. The reversal of 3646840427 is 7240486463.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3646840427 - 2¹⁰ = 3646839403 is a prime.

Together with 3646840429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3646840429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1823420213 + 1823420214.

It is an arithmetic number, because the mean of its divisors is an integer number (1823420214).

Almost surely, 2^3646840427 is an apocalyptic number.

3646840427 is a deficient number, since it is larger than the sum of its proper divisors (1).

3646840427 is an equidigital number, since it uses as much as digits as its factorization.

3646840427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 44.

The square root of 3646840427 is about 60389.0753944784. The cubic root of 3646840427 is about 1539.2373278425.

The spelling of 3646840427 in words is "three billion, six hundred forty-six million, eight hundred forty thousand, four hundred twenty-seven".