3625649 has 2 divisors, whose sum is σ = 3625650. Its totient is φ = 3625648.

The previous prime is 3625621. The next prime is 3625669. The reversal of 3625649 is 9465263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 1575025 = 1432^2 + 1255^2 .

It is an emirp because it is prime and its reverse (9465263) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3625649 - 2¹⁶ = 3560113 is a prime.

It is a Chen prime.

It is equal to p₂₅₈₄₇₉ and since 3625649 and 258479 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3625619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1812824 + 1812825.

It is an arithmetic number, because the mean of its divisors is an integer number (1812825).

Almost surely, 2^3625649 is an apocalyptic number.

It is an amenable number.

3625649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3625649 is an equidigital number, since it uses as much as digits as its factorization.

3625649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 3625649 is about 1904.1137045880. The cubic root of 3625649 is about 153.6250082481.

The spelling of 3625649 in words is "three million, six hundred twenty-five thousand, six hundred forty-nine".