3640697 has 2 divisors, whose sum is σ = 3640698. Its totient is φ = 3640696.

The previous prime is 3640661. The next prime is 3640711. The reversal of 3640697 is 7960463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3613801 + 26896 = 1901^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640697 - 2⁶ = 3640633 is a prime.

It is a Chen prime.

It is equal to p₂₅₉₄₆₉ and since 3640697 and 259469 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 (3640597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820348 + 1820349.

It is an arithmetic number, because the mean of its divisors is an integer number (1820349).

Almost surely, 2^3640697 is an apocalyptic number.

It is an amenable number.

3640697 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640697 is an equidigital number, since it uses as much as digits as its factorization.

3640697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 3640697 is about 1908.0610577233. The cubic root of 3640697 is about 153.8372514656.

The spelling of 3640697 in words is "three million, six hundred forty thousand, six hundred ninety-seven".