61318587 has 8 divisors (see below), whose sum is σ = 89190720. Its totient is φ = 37162760.

The previous prime is 61318577. The next prime is 61318591. The reversal of 61318587 is 78581316.

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

It is a cyclic number.

It is not a de Polignac number, because 61318587 - 2¹⁴ = 61302203 is a prime.

It is a super-2 number, since 2×61318587² = 7519938223353138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61318577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929037 + ... + 929102.

It is an arithmetic number, because the mean of its divisors is an integer number (11148840).

Almost surely, 2^61318587 is an apocalyptic number.

61318587 is a deficient number, since it is larger than the sum of its proper divisors (27872133).

61318587 is a wasteful number, since it uses less digits than its factorization.

61318587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858153.

The product of its digits is 40320, while the sum is 39.

The square root of 61318587 is about 7830.6185579429. The cubic root of 61318587 is about 394.3338384377. Note that the first 3 decimals are identical.

The spelling of 61318587 in words is "sixty-one million, three hundred eighteen thousand, five hundred eighty-seven".