61069791 has 4 divisors (see below), whose sum is σ = 81426392. Its totient is φ = 40713192.

The previous prime is 61069769. The next prime is 61069817. The reversal of 61069791 is 19796016.

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

It is not a de Polignac number, because 61069791 - 2⁵ = 61069759 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 (61069691) 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, 10178296 + ... + 10178301.

It is an arithmetic number, because the mean of its divisors is an integer number (20356598).

Almost surely, 2^61069791 is an apocalyptic number.

61069791 is a deficient number, since it is larger than the sum of its proper divisors (20356601).

61069791 is a wasteful number, since it uses less digits than its factorization.

61069791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20356600.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 61069791 is about 7814.7163096302. The cubic root of 61069791 is about 393.7997879094.

The spelling of 61069791 in words is "sixty-one million, sixty-nine thousand, seven hundred ninety-one".