11312731 has 2 divisors, whose sum is σ = 11312732. Its totient is φ = 11312730.

The previous prime is 11312729. The next prime is 11312801. The reversal of 11312731 is 13721311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11312731 - 2¹ = 11312729 is a prime.

It is a super-3 number, since 3×11312731³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 11312729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11312699 and 11312708.

It is not a weakly prime, because it can be changed into another prime (11312831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656365 + 5656366.

It is an arithmetic number, because the mean of its divisors is an integer number (5656366).

Almost surely, 2^11312731 is an apocalyptic number.

11312731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312731 is an equidigital number, since it uses as much as digits as its factorization.

11312731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126, while the sum is 19.

The square root of 11312731 is about 3363.4403517827. The cubic root of 11312731 is about 224.4859441302.

The spelling of 11312731 in words is "eleven million, three hundred twelve thousand, seven hundred thirty-one".