61000491 has 8 divisors (see below), whose sum is σ = 81385024. Its totient is φ = 40641480.

The previous prime is 61000481. The next prime is 61000493. The reversal of 61000491 is 19400016.

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

It is not a de Polignac number, because 61000491 - 2¹⁴ = 60984107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61000493) 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, 156 + ... + 11046.

It is an arithmetic number, because the mean of its divisors is an integer number (10173128).

Almost surely, 2^61000491 is an apocalyptic number.

61000491 is a deficient number, since it is larger than the sum of its proper divisors (20384533).

61000491 is a wasteful number, since it uses less digits than its factorization.

61000491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12761.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 61000491 is about 7810.2811088974. The cubic root of 61000491 is about 393.6507744932.

The spelling of 61000491 in words is "sixty-one million, four hundred ninety-one", and thus it is an aban number.