61791899 has 8 divisors (see below), whose sum is σ = 67294080. Its totient is φ = 56396736.

The previous prime is 61791893. The next prime is 61791913. The reversal of 61791899 is 99819716.

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 61791899 - 2⁴ = 61791883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61791893) 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, 25547 + ... + 27860.

It is an arithmetic number, because the mean of its divisors is an integer number (8411760).

Almost surely, 2^61791899 is an apocalyptic number.

61791899 is a deficient number, since it is larger than the sum of its proper divisors (5502181).

61791899 is a wasteful number, since it uses less digits than its factorization.

61791899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53509.

The product of its digits is 244944, while the sum is 50.

The square root of 61791899 is about 7860.7823402000. The cubic root of 61791899 is about 395.3458467571.

The spelling of 61791899 in words is "sixty-one million, seven hundred ninety-one thousand, eight hundred ninety-nine".