61179791 has 4 divisors (see below), whose sum is σ = 64399800. Its totient is φ = 57959784.

The previous prime is 61179739. The next prime is 61179799. The reversal of 61179791 is 19797116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61179791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61179799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1609976 + ... + 1610013.

It is an arithmetic number, because the mean of its divisors is an integer number (16099950).

Almost surely, 2^61179791 is an apocalyptic number.

61179791 is a deficient number, since it is larger than the sum of its proper divisors (3220009).

61179791 is a wasteful number, since it uses less digits than its factorization.

61179791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220008.

The product of its digits is 23814, while the sum is 41.

The square root of 61179791 is about 7821.7511466423. The cubic root of 61179791 is about 394.0360858323.

The spelling of 61179791 in words is "sixty-one million, one hundred seventy-nine thousand, seven hundred ninety-one".