991294349 has 2 divisors, whose sum is σ = 991294350. Its totient is φ = 991294348.

The previous prime is 991294267. The next prime is 991294363. The reversal of 991294349 is 943492199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750486025 + 240808324 = 27395^2 + 15518^2 .

It is a cyclic number.

It is not a de Polignac number, because 991294349 - 2²⁸ = 722858893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 991294297 and 991294306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (991293349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495647174 + 495647175.

It is an arithmetic number, because the mean of its divisors is an integer number (495647175).

Almost surely, 2^991294349 is an apocalyptic number.

It is an amenable number.

991294349 is a deficient number, since it is larger than the sum of its proper divisors (1).

991294349 is an equidigital number, since it uses as much as digits as its factorization.

991294349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 50.

The square root of 991294349 is about 31484.8272823594. The cubic root of 991294349 is about 997.0896544390.

The spelling of 991294349 in words is "nine hundred ninety-one million, two hundred ninety-four thousand, three hundred forty-nine".