911481409 has 2 divisors, whose sum is σ = 911481410. Its totient is φ = 911481408.

The previous prime is 911481407. The next prime is 911481427. The reversal of 911481409 is 904184119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867125809 + 44355600 = 29447^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 911481409 - 2¹ = 911481407 is a prime.

Together with 911481407, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (911481407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455740704 + 455740705.

It is an arithmetic number, because the mean of its divisors is an integer number (455740705).

Almost surely, 2^911481409 is an apocalyptic number.

It is an amenable number.

911481409 is a deficient number, since it is larger than the sum of its proper divisors (1).

911481409 is an equidigital number, since it uses as much as digits as its factorization.

911481409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 911481409 is about 30190.7503881570. The cubic root of 911481409 is about 969.5776703301.

The spelling of 911481409 in words is "nine hundred eleven million, four hundred eighty-one thousand, four hundred nine".