61008009 has 8 divisors (see below), whose sum is σ = 81560160. Its totient is φ = 40563936.

The previous prime is 61008001. The next prime is 61008043. The reversal of 61008009 is 90080016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61008009 - 2³ = 61008001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61008009.

It is not an unprimeable number, because it can be changed into a prime (61008001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25692 + ... + 27965.

It is an arithmetic number, because the mean of its divisors is an integer number (10195020).

Almost surely, 2^61008009 is an apocalyptic number.

It is an amenable number.

61008009 is a deficient number, since it is larger than the sum of its proper divisors (20552151).

61008009 is a wasteful number, since it uses less digits than its factorization.

61008009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54039.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 61008009 is about 7810.7623827639. The cubic root of 61008009 is about 393.6669456470. Note that the first 3 decimals are identical.

The spelling of 61008009 in words is "sixty-one million, eight thousand, nine".