61720396 has 6 divisors (see below), whose sum is σ = 108010700. Its totient is φ = 30860196.

The previous prime is 61720369. The next prime is 61720397. The reversal of 61720396 is 69302716.

It is not an unprimeable number, because it can be changed into a prime (61720397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7715046 + ... + 7715053.

Almost surely, 2^61720396 is an apocalyptic number.

It is an amenable number.

61720396 is a deficient number, since it is larger than the sum of its proper divisors (46290304).

61720396 is a wasteful number, since it uses less digits than its factorization.

61720396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15430103 (or 15430101 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 61720396 is about 7856.2329395201. The cubic root of 61720396 is about 395.1932953427.

The spelling of 61720396 in words is "sixty-one million, seven hundred twenty thousand, three hundred ninety-six".