61288691 has 8 divisors (see below), whose sum is σ = 62402400. Its totient is φ = 60182080.

The previous prime is 61288649. The next prime is 61288709. The reversal of 61288691 is 19688216.

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 61288691 - 2⁶ = 61288627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61285691) 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, 17495 + ... + 20703.

It is an arithmetic number, because the mean of its divisors is an integer number (7800300).

Almost surely, 2^61288691 is an apocalyptic number.

61288691 is a deficient number, since it is larger than the sum of its proper divisors (1113709).

61288691 is a wasteful number, since it uses less digits than its factorization.

61288691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549.

The product of its digits is 41472, while the sum is 41.

The square root of 61288691 is about 7828.7094083252. The cubic root of 61288691 is about 394.2697419353.

The spelling of 61288691 in words is "sixty-one million, two hundred eighty-eight thousand, six hundred ninety-one".