61977198 has 8 divisors (see below), whose sum is σ = 123954408. Its totient is φ = 20659064.

The previous prime is 61977151. The next prime is 61977217. The reversal of 61977198 is 89177916.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

61977198 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5164761 + ... + 5164772.

It is an arithmetic number, because the mean of its divisors is an integer number (15494301).

Almost surely, 2^61977198 is an apocalyptic number.

61977198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61977198 is a wasteful number, since it uses less digits than its factorization.

61977198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10329538.

The product of its digits is 190512, while the sum is 48.

The square root of 61977198 is about 7872.5598124117. The cubic root of 61977198 is about 395.7406346722.

The spelling of 61977198 in words is "sixty-one million, nine hundred seventy-seven thousand, one hundred ninety-eight".