61549493 has 8 divisors (see below), whose sum is σ = 64938720. Its totient is φ = 58175280.

The previous prime is 61549489. The next prime is 61549517. The reversal of 61549493 is 39494516.

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 61549493 - 2² = 61549489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61549493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61549393) 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, 5246 + ... + 12272.

It is an arithmetic number, because the mean of its divisors is an integer number (8117340).

Almost surely, 2^61549493 is an apocalyptic number.

It is an amenable number.

61549493 is a deficient number, since it is larger than the sum of its proper divisors (3389227).

61549493 is a wasteful number, since it uses less digits than its factorization.

61549493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507.

The product of its digits is 116640, while the sum is 41.

The square root of 61549493 is about 7845.3484944902. The cubic root of 61549493 is about 394.8281963960.

The spelling of 61549493 in words is "sixty-one million, five hundred forty-nine thousand, four hundred ninety-three".