3640537 has 2 divisors, whose sum is σ = 3640538. Its totient is φ = 3640536.

The previous prime is 3640523. The next prime is 3640543. The reversal of 3640537 is 7350463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3308761 + 331776 = 1819^2 + 576^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640537 - 2⁷ = 3640409 is a prime.

It is not a weakly prime, because it can be changed into another prime (3640577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1820268 + 1820269.

It is an arithmetic number, because the mean of its divisors is an integer number (1820269).

Almost surely, 2^3640537 is an apocalyptic number.

It is an amenable number.

3640537 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640537 is an equidigital number, since it uses as much as digits as its factorization.

3640537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 3640537 is about 1908.0191298831. The cubic root of 3640537 is about 153.8349978385.

The spelling of 3640537 in words is "three million, six hundred forty thousand, five hundred thirty-seven".