61486609 has 4 divisors (see below), whose sum is σ = 63470080. Its totient is φ = 59503140.

The previous prime is 61486591. The next prime is 61486631. The reversal of 61486609 is 90668416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61486609 - 2¹⁷ = 61355537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61486309) 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, 991689 + ... + 991750.

It is an arithmetic number, because the mean of its divisors is an integer number (15867520).

Almost surely, 2^61486609 is an apocalyptic number.

It is an amenable number.

61486609 is a deficient number, since it is larger than the sum of its proper divisors (1983471).

61486609 is a wasteful number, since it uses less digits than its factorization.

61486609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983470.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 61486609 is about 7841.3397452221. The cubic root of 61486609 is about 394.6936876429.

The spelling of 61486609 in words is "sixty-one million, four hundred eighty-six thousand, six hundred nine".