61691113 has 8 divisors (see below), whose sum is σ = 71258400. Its totient is φ = 52783680.

The previous prime is 61691087. The next prime is 61691117. The reversal of 61691113 is 31119616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61691113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61691117) 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, 164763 + ... + 165136.

It is an arithmetic number, because the mean of its divisors is an integer number (8907300).

Almost surely, 2^61691113 is an apocalyptic number.

It is an amenable number.

61691113 is a deficient number, since it is larger than the sum of its proper divisors (9567287).

61691113 is a wasteful number, since it uses less digits than its factorization.

61691113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329927.

The product of its digits is 972, while the sum is 28.

The square root of 61691113 is about 7854.3690389490. The cubic root of 61691113 is about 395.1307861525.

The spelling of 61691113 in words is "sixty-one million, six hundred ninety-one thousand, one hundred thirteen".