61979897 has 8 divisors (see below), whose sum is σ = 70896000. Its totient is φ = 53079264.

The previous prime is 61979893. The next prime is 61979927. The reversal of 61979897 is 79897916.

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

It is not a de Polignac number, because 61979897 - 2² = 61979893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61979893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6629 + ... + 12957.

It is an arithmetic number, because the mean of its divisors is an integer number (8862000).

Almost surely, 2^61979897 is an apocalyptic number.

It is an amenable number.

61979897 is a deficient number, since it is larger than the sum of its proper divisors (8916103).

61979897 is a wasteful number, since it uses less digits than its factorization.

61979897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7735.

The product of its digits is 1714608, while the sum is 56.

The square root of 61979897 is about 7872.7312287414. The cubic root of 61979897 is about 395.7463791960.

The spelling of 61979897 in words is "sixty-one million, nine hundred seventy-nine thousand, eight hundred ninety-seven".