993381761 has 8 divisors (see below), whose sum is σ = 1013990400. Its totient is φ = 972898960.

The previous prime is 993381721. The next prime is 993381793. The reversal of 993381761 is 167183399.

It is a happy number.

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 993381761 - 2²² = 989187457 is a prime.

It is a super-2 number, since 2×993381761² = 1973614646174922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993381721) 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, 15425 + ... + 47166.

It is an arithmetic number, because the mean of its divisors is an integer number (126748800).

Almost surely, 2^993381761 is an apocalyptic number.

It is an amenable number.

993381761 is a deficient number, since it is larger than the sum of its proper divisors (20608639).

993381761 is a wasteful number, since it uses less digits than its factorization.

993381761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62919.

The product of its digits is 244944, while the sum is 47.

The square root of 993381761 is about 31517.9593406680. The cubic root of 993381761 is about 997.7890355723.

The spelling of 993381761 in words is "nine hundred ninety-three million, three hundred eighty-one thousand, seven hundred sixty-one".