11915471 has 2 divisors, whose sum is σ = 11915472. Its totient is φ = 11915470.

The previous prime is 11915447. The next prime is 11915473. The reversal of 11915471 is 17451911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11915471 - 2²² = 7721167 is a prime.

It is a super-3 number, since 3×11915471³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 11915473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11915473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957735 + 5957736.

It is an arithmetic number, because the mean of its divisors is an integer number (5957736).

Almost surely, 2^11915471 is an apocalyptic number.

11915471 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915471 is an equidigital number, since it uses as much as digits as its factorization.

11915471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 29.

The square root of 11915471 is about 3451.8793431984. The cubic root of 11915471 is about 228.4040171644.

The spelling of 11915471 in words is "eleven million, nine hundred fifteen thousand, four hundred seventy-one".