42653609 has 2 divisors, whose sum is σ = 42653610. Its totient is φ = 42653608.

The previous prime is 42653599. The next prime is 42653627. The reversal of 42653609 is 90635624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37027225 + 5626384 = 6085^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 42653609 - 2⁴ = 42653593 is a prime.

It is not a weakly prime, because it can be changed into another prime (42653509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21326804 + 21326805.

It is an arithmetic number, because the mean of its divisors is an integer number (21326805).

Almost surely, 2^42653609 is an apocalyptic number.

It is an amenable number.

42653609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42653609 is an equidigital number, since it uses as much as digits as its factorization.

42653609 is an evil number, because the sum of its binary digits is even.

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

The square root of 42653609 is about 6530.9730515445. The cubic root of 42653609 is about 349.3965356246.

The spelling of 42653609 in words is "forty-two million, six hundred fifty-three thousand, six hundred nine".