993140761 has 2 divisors, whose sum is σ = 993140762. Its totient is φ = 993140760.

The previous prime is 993140689. The next prime is 993140779. The reversal of 993140761 is 167041399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851530761 + 141610000 = 29181^2 + 11900^2 .

It is a cyclic number.

It is not a de Polignac number, because 993140761 - 2²¹ = 991043609 is a prime.

It is not a weakly prime, because it can be changed into another prime (993149761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496570380 + 496570381.

It is an arithmetic number, because the mean of its divisors is an integer number (496570381).

Almost surely, 2^993140761 is an apocalyptic number.

It is an amenable number.

993140761 is a deficient number, since it is larger than the sum of its proper divisors (1).

993140761 is an equidigital number, since it uses as much as digits as its factorization.

993140761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 993140761 is about 31514.1358916915. The cubic root of 993140761 is about 997.7083393030.

The spelling of 993140761 in words is "nine hundred ninety-three million, one hundred forty thousand, seven hundred sixty-one".