76061609 has 4 divisors (see below), whose sum is σ = 81912516. Its totient is φ = 70210704.

The previous prime is 76061599. The next prime is 76061639. The reversal of 76061609 is 90616067.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90616067 = 23 ⋅3939829.

It can be written as a sum of positive squares in 2 ways, for example, as 43033600 + 33028009 = 6560^2 + 5747^2 .

It is a cyclic number.

It is not a de Polignac number, because 76061609 - 2⁴ = 76061593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76061639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2925434 + ... + 2925459.

It is an arithmetic number, because the mean of its divisors is an integer number (20478129).

Almost surely, 2^76061609 is an apocalyptic number.

It is an amenable number.

76061609 is a deficient number, since it is larger than the sum of its proper divisors (5850907).

76061609 is a wasteful number, since it uses less digits than its factorization.

76061609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850906.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 76061609 is about 8721.3306897514. The cubic root of 76061609 is about 423.6967857809.

The spelling of 76061609 in words is "seventy-six million, sixty-one thousand, six hundred nine".