61976689 has 4 divisors (see below), whose sum is σ = 65238640. Its totient is φ = 58714740.

The previous prime is 61976653. The next prime is 61976693. The reversal of 61976689 is 98667916.

61976689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61976689 - 2⁹ = 61976177 is a prime.

It is a super-2 number, since 2×61976689² = 7682219958805442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61976639) 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 3 ways as a sum of consecutive naturals, for example, 1630947 + ... + 1630984.

It is an arithmetic number, because the mean of its divisors is an integer number (16309660).

Almost surely, 2^61976689 is an apocalyptic number.

It is an amenable number.

61976689 is a deficient number, since it is larger than the sum of its proper divisors (3261951).

61976689 is a wasteful number, since it uses less digits than its factorization.

61976689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261950.

The product of its digits is 979776, while the sum is 52.

The square root of 61976689 is about 7872.5274848679. The cubic root of 61976689 is about 395.7395513031.

The spelling of 61976689 in words is "sixty-one million, nine hundred seventy-six thousand, six hundred eighty-nine".