61805393 has 16 divisors (see below), whose sum is σ = 70202496. Its totient is φ = 53982720.

The previous prime is 61805389. The next prime is 61805399. The reversal of 61805393 is 39350816.

It is a cyclic number.

It is not a de Polignac number, because 61805393 - 2² = 61805389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61805399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27938 + ... + 30068.

It is an arithmetic number, because the mean of its divisors is an integer number (4387656).

Almost surely, 2^61805393 is an apocalyptic number.

It is an amenable number.

61805393 is a deficient number, since it is larger than the sum of its proper divisors (8397103).

61805393 is a wasteful number, since it uses less digits than its factorization.

61805393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 61805393 is about 7861.6406048610. The cubic root of 61805393 is about 395.3746229594.

The spelling of 61805393 in words is "sixty-one million, eight hundred five thousand, three hundred ninety-three".