993280731 has 8 divisors (see below), whose sum is σ = 1324572480. Its totient is φ = 662088072.

The previous prime is 993280697. The next prime is 993280733. The reversal of 993280731 is 137082399.

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

It is not a de Polignac number, because 993280731 - 2⁹ = 993280219 is a prime.

It is a super-2 number, since 2×993280731² = 1973213221151788722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (993280733) 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, 3100 + ... + 44678.

It is an arithmetic number, because the mean of its divisors is an integer number (165571560).

Almost surely, 2^993280731 is an apocalyptic number.

993280731 is a deficient number, since it is larger than the sum of its proper divisors (331291749).

993280731 is a wasteful number, since it uses less digits than its factorization.

993280731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49545.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 993280731 is about 31516.3565629024. The cubic root of 993280731 is about 997.7552083477.

The spelling of 993280731 in words is "nine hundred ninety-three million, two hundred eighty thousand, seven hundred thirty-one".