61763993 has 8 divisors (see below), whose sum is σ = 64535616. Its totient is φ = 58999600.

The previous prime is 61763987. The next prime is 61764013. The reversal of 61763993 is 39936716.

It is a happy number.

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

It is not a de Polignac number, because 61763993 - 2⁶ = 61763929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61763393) 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, 23138 + ... + 25668.

It is an arithmetic number, because the mean of its divisors is an integer number (8066952).

Almost surely, 2^61763993 is an apocalyptic number.

It is an amenable number.

61763993 is a deficient number, since it is larger than the sum of its proper divisors (2771623).

61763993 is a wasteful number, since it uses less digits than its factorization.

61763993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615.

The product of its digits is 183708, while the sum is 44.

The square root of 61763993 is about 7859.0071255853. The cubic root of 61763993 is about 395.2863234074.

The spelling of 61763993 in words is "sixty-one million, seven hundred sixty-three thousand, nine hundred ninety-three".