61977446 has 4 divisors (see below), whose sum is σ = 92966172. Its totient is φ = 30988722.

The previous prime is 61977439. The next prime is 61977473. The reversal of 61977446 is 64477916.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61977397 and 61977406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15494360 + ... + 15494363.

It is an arithmetic number, because the mean of its divisors is an integer number (23241543).

Almost surely, 2^61977446 is an apocalyptic number.

61977446 is a deficient number, since it is larger than the sum of its proper divisors (30988726).

61977446 is a wasteful number, since it uses less digits than its factorization.

61977446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30988725.

The product of its digits is 254016, while the sum is 44.

The square root of 61977446 is about 7872.5755633084. The cubic root of 61977446 is about 395.7411625198.

The spelling of 61977446 in words is "sixty-one million, nine hundred seventy-seven thousand, four hundred forty-six".