981249011 has 2 divisors, whose sum is σ = 981249012. Its totient is φ = 981249010.

The previous prime is 981249007. The next prime is 981249019. The reversal of 981249011 is 110942189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981249011 - 2² = 981249007 is a prime.

It is not a weakly prime, because it can be changed into another prime (981249019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490624505 + 490624506.

It is an arithmetic number, because the mean of its divisors is an integer number (490624506).

Almost surely, 2^981249011 is an apocalyptic number.

981249011 is a deficient number, since it is larger than the sum of its proper divisors (1).

981249011 is an equidigital number, since it uses as much as digits as its factorization.

981249011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 981249011 is about 31324.8944291916. The cubic root of 981249011 is about 993.7101915886.

The spelling of 981249011 in words is "nine hundred eighty-one million, two hundred forty-nine thousand, eleven".