42719609 has 2 divisors, whose sum is σ = 42719610. Its totient is φ = 42719608.

The previous prime is 42719557. The next prime is 42719617. The reversal of 42719609 is 90691724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 14417209 = 5320^2 + 3797^2 .

It is a cyclic number.

It is not a de Polignac number, because 42719609 - 2¹² = 42715513 is a prime.

It is a super-2 number, since 2×42719609² = 3649929986225762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42719629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21359804 + 21359805.

It is an arithmetic number, because the mean of its divisors is an integer number (21359805).

Almost surely, 2^42719609 is an apocalyptic number.

It is an amenable number.

42719609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42719609 is an equidigital number, since it uses as much as digits as its factorization.

42719609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 42719609 is about 6536.0239442646. The cubic root of 42719609 is about 349.5766554946.

The spelling of 42719609 in words is "forty-two million, seven hundred nineteen thousand, six hundred nine".