61379779 has 4 divisors (see below), whose sum is σ = 61395840. Its totient is φ = 61363720.

The previous prime is 61379771. The next prime is 61379807. The reversal of 61379779 is 97797316.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61379779 - 2³ = 61379771 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61379771) 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, 1374 + ... + 11164.

It is an arithmetic number, because the mean of its divisors is an integer number (15348960).

Almost surely, 2^61379779 is an apocalyptic number.

61379779 is a deficient number, since it is larger than the sum of its proper divisors (16061).

61379779 is an equidigital number, since it uses as much as digits as its factorization.

61379779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16060.

The product of its digits is 500094, while the sum is 49.

The square root of 61379779 is about 7834.5248100954. The cubic root of 61379779 is about 394.4649680843.

The spelling of 61379779 in words is "sixty-one million, three hundred seventy-nine thousand, seven hundred seventy-nine".