61677971 has 8 divisors (see below), whose sum is σ = 65176320. Its totient is φ = 58204872.

The previous prime is 61677923. The next prime is 61677991. The reversal of 61677971 is 17977616.

It is a happy number.

61677971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61677971 - 2¹⁰ = 61676947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61677901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175 + ... + 11168.

It is an arithmetic number, because the mean of its divisors is an integer number (8147040).

Almost surely, 2^61677971 is an apocalyptic number.

61677971 is a deficient number, since it is larger than the sum of its proper divisors (3498349).

61677971 is a wasteful number, since it uses less digits than its factorization.

61677971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12625.

The product of its digits is 111132, while the sum is 44.

The square root of 61677971 is about 7853.5323899504. The cubic root of 61677971 is about 395.1027260461.

It can be divided in two parts, 616 and 77971, that added together give a palindrome (78587).

The spelling of 61677971 in words is "sixty-one million, six hundred seventy-seven thousand, nine hundred seventy-one".