61993547 has 8 divisors (see below), whose sum is σ = 77290752. Its totient is φ = 48306600.

The previous prime is 61993541. The next prime is 61993549. The reversal of 61993547 is 74539916.

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

It is a cyclic number.

It is not a de Polignac number, because 61993547 - 2⁴ = 61993531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61993498 and 61993507.

It is not an unprimeable number, because it can be changed into a prime (61993541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402479 + ... + 402632.

It is an arithmetic number, because the mean of its divisors is an integer number (9661344).

Almost surely, 2^61993547 is an apocalyptic number.

61993547 is a deficient number, since it is larger than the sum of its proper divisors (15297205).

61993547 is a wasteful number, since it uses less digits than its factorization.

61993547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805129.

The product of its digits is 204120, while the sum is 44.

The square root of 61993547 is about 7873.5980974393. The cubic root of 61993547 is about 395.7754291612.

The spelling of 61993547 in words is "sixty-one million, nine hundred ninety-three thousand, five hundred forty-seven".