61580969 has 4 divisors (see below), whose sum is σ = 62272980. Its totient is φ = 60888960.

The previous prime is 61580963. The next prime is 61580977. The reversal of 61580969 is 96908516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22992025 + 38588944 = 4795^2 + 6212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61580969 is a prime.

It is a super-2 number, since 2×61580969² = 7584431485957922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61580963) 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, 345872 + ... + 346049.

It is an arithmetic number, because the mean of its divisors is an integer number (15568245).

Almost surely, 2^61580969 is an apocalyptic number.

It is an amenable number.

61580969 is a deficient number, since it is larger than the sum of its proper divisors (692011).

61580969 is an equidigital number, since it uses as much as digits as its factorization.

61580969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692010.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 61580969 is about 7847.3542675223. The cubic root of 61580969 is about 394.8954890946.

The spelling of 61580969 in words is "sixty-one million, five hundred eighty thousand, nine hundred sixty-nine".