991410793 has 2 divisors, whose sum is σ = 991410794. Its totient is φ = 991410792.

The previous prime is 991410787. The next prime is 991410839. The reversal of 991410793 is 397014199.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988284969 + 3125824 = 31437^2 + 1768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-991410793 is a prime.

It is not a weakly prime, because it can be changed into another prime (991410703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495705396 + 495705397.

It is an arithmetic number, because the mean of its divisors is an integer number (495705397).

Almost surely, 2^991410793 is an apocalyptic number.

It is an amenable number.

991410793 is a deficient number, since it is larger than the sum of its proper divisors (1).

991410793 is an equidigital number, since it uses as much as digits as its factorization.

991410793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 991410793 is about 31486.6764362325. The cubic root of 991410793 is about 997.1286944954.

The spelling of 991410793 in words is "nine hundred ninety-one million, four hundred ten thousand, seven hundred ninety-three".