3638651 has 2 divisors, whose sum is σ = 3638652. Its totient is φ = 3638650.

The previous prime is 3638641. The next prime is 3638653. The reversal of 3638651 is 1568363.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3638651 - 2¹⁸ = 3376507 is a prime.

Together with 3638653, 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 (3638653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819325 + 1819326.

It is an arithmetic number, because the mean of its divisors is an integer number (1819326).

Almost surely, 2^3638651 is an apocalyptic number.

3638651 is a deficient number, since it is larger than the sum of its proper divisors (1).

3638651 is an equidigital number, since it uses as much as digits as its factorization.

3638651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 3638651 is about 1907.5248360113. The cubic root of 3638651 is about 153.8084282306.

The spelling of 3638651 in words is "three million, six hundred thirty-eight thousand, six hundred fifty-one".